SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES | SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation and Principles of Consolidation System1, Inc. was a special purpose acquisition company originally incorporated as a Cayman Islands exempted company on February 11, 2020 under the name Trebia Acquisition Corp. (“Trebia”). The Company was formed for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses (the “Merger”). On January 27, 2022, the Company consummated its Merger, which resulted in the acquisition of S1 Holdco, LLC (“S1 Holdco”) and System1 SS Protected Holdings, Inc. (“Protected”). As a result of the Merger, the results of operations, financial position and cash flows of the Predecessor and Successor are not directly comparable. The Company was deemed the accounting acquirer in the Merger based on an analysis of the criteria outlined in Accounting Standards Codification 805, Business Combinations . S1 Holdco was deemed to be the predecessor entity based on an analysis of the criteria outlined in the Accounting Standards Codification 805, Business Combinations . Accordingly, the historical financial statements of S1 Holdco became the historical financial statements of the combined Company, upon the consummation of the Merger. As a result, the financial statements included in this report reflect (i) the historical operating results of S1 Holdco prior to the Merger and (ii) the combined results of the Company, including S1 Holdco and Protected following the closing of the Merger. The accompanying financial statements include a Predecessor period, which includes the period through January 26, 2022 concurrent with the Merger, and a Successor period from January 27, 2022 through March 31, 2022. A black-line between the Successor and Predecessor periods has been placed in the condensed consolidated financial statements and in the tables to the notes to the condensed consolidated financial statements to highlight the lack of comparability between these two periods. The accompanying condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (U.S. GAAP). The accompanying condensed consolidated financial statements include the accounts of System1, Inc. and its subsidiaries for the Successor period, and S1 Holdco for the Predecessor periods. All intercompany accounts and transactions have been eliminated in the consolidation of the financial statements. The condensed consolidated financial statements have been prepared by the Company and are unaudited, pursuant to the rules and regulations of the United States Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such SEC rules and regulations. The interim condensed consolidated financial statements included herein reflect all adjustments (consisting of normal recurring adjustments) which are, in the opinion of management, necessary for a fair statement of the financial position, results of operations and cash flows for the interim periods presented. The year-end condensed consolidated balance sheet data was derived from audited financial statements of S1 Holdco and related notes included in the Company’s final prospectus filed with the SEC pursuant to Rule 424(b) under the Securities Act of 1933, as amended, on April 19, 2022 (the “Prospectus”), but does not include all disclosures required by U.S. GAAP. The Condensed Consolidated Statements of Operations for the period from January 1, 2022 through January 26, 2022 (Predecessor) and for the period from January 27, 2022 through March 31, 2022 (Successor) are not necessarily indicative of the results to be anticipated for the entire year ending December 31, 2022 or thereafter. Certain prior period amounts in the condensed consolidated financial statements have been reclassified to conform with the current period presentation. These reclassifications had no effect on the results of operations or financial position for any period presented. Capital Resources, Liquidity, and Concentrations To date, the Company’s available liquidity and operations have been financed through the initial public offering of Trebia, the backstop agreement, external loan facilities, and cash flows from operations. The Company is subject to certain business risks, including dependence on key employees, dependence on key contracts, competition from alternative technologies, and dependence on growth to achieve its business and operational objectives. The Company’s revenue is dependent on two key Advertising Partners, which are Google and Microsoft, and which comprised 88% and 4%, respectively, of the Company’s revenue for the period from January 1, 2022 through January 26, 2022 (Predecessor), 73% and 3%, respectively, of the Company's revenue from January 27, 2022 through March 31, 2022 (Successor), and 83% and 5%, respectively, of the Company’s revenue for the three months ended March 31, 2021 (Predecessor). The Company has (i) two paid search advertising partnership contracts with Google, and (ii) one paid search advertising partnership contract with Microsoft. One of the Google contracts was renewed with an effective date of March 1, 2021, and has a two-year term through February 28, 2023. The other Google contract was renewed with a two-year term through July 31, 2023. All arrangements under the Microsoft contract were originally set to expire on November 30, 2021. However, the parties initially agreed to a three-month extension through February 28, 2022, and thereafter the contract continues to automatically renew on a month to month basis as the parties work to finalize a renewal or long-term extension of this arrangement. All three agreements may be terminated by the respective Advertising Partner immediately or with minimal notice under certain circumstances. Impact of COVID-19 The worldwide spread of COVID-19 has resulted, and is expected to continue to result, in a global slowdown of economic activity which is likely to decrease demand for a broad variety of goods and services, including those provided by the Company’s clients, while also disrupting sales channels and advertising and marketing activities for an unknown period of time until the virus is contained or economic activity normalizes. Our revenue growth and results of operations have been resilient despite the headwinds created by the COVID-19 pandemic. The extent to which ongoing and future developments related to the global impact of the COVID-19 pandemic, including related vaccination measures and inoculation rates designed to curb its spread, continue to impact its business, financial condition, results of operations and cash flows, cannot be predicted with certainty. Many of these ongoing and future developments and uncertainties are beyond the Company's control, including the speed of contagion or the spread of new variants, the development, distribution and implementation of effective preventative or treatment measures, including vaccines (and vaccination rates), the scope of governmental and other restrictions on travel, discretionary services and other activity, and the public reactions and receptiveness to these developments. A summary of the significant accounting policies followed by the Company in the preparation of the accompanying condensed consolidated financial statements is set forth below. Use of Estimates The preparation of these condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements, and the reported amounts of revenues and expenses during the reporting period. Significant estimates and assumptions reflected in these condensed consolidated financial statements include, but are not limited to, valuation of goodwill, acquired intangible assets and long-lived assets for impairment, inputs into the valuation of the Company’s share-based compensation awards, income taxes, variable and contingent consideration and determination of the fair value of the warrant liabilities. Significant estimates affecting the condensed consolidated financial statements have been prepared on the basis of the most current and best available information, including historical experience, known trends and other market-specific or other relevant factors that the Company believes to be reasonable. On an ongoing basis, management evaluates its estimates, as there are changes in circumstances, facts and experience. Changes in estimates are recorded in periods which they become known. However, actual results from the resolution of such estimates and assumptions may vary from those used in the preparation of the condensed consolidated financial statements. The full extent to which the COVID-19 pandemic will directly or indirectly impact the Company’s business, results of operations and financial condition will depend on future developments that are highly uncertain. Cash and cash equivalents Cash and cash equivalents consist of amounts held as bank deposits. Accounts Receivable Accounts receivable primarily represent amounts due from its Advertising Partners, these accounts receivable are stated at the amount the Company expects to collect from outstanding balances and do not bear interest. The Company does not require collateral for its accounts receivable. The Company considers the following factors when determining the collectability of specific customer accounts: past transaction history with the customer, and current economic industry trends. These accounts receivables have historically been paid on a timely basis. Due to the nature of the accounts receivable balance, the Company believes there is no significant risk of non-collection and therefore no allowance for doubtful accounts is required as of March 31, 2022 (Successor) and December 31, 2021 (Predecessor), respectively. The payment terms for the Company's accounts receivable are typically 30 days. Concentration of Credit Risk Financial instruments that potentially subject the Company to credit risk consist principally of cash and accounts receivable. Cash is deposited with high-credit-quality financial institutions and, at times, such balances with any one financial institution may exceed the insurance limits of the prevailing regulatory body. Historically, the Company has not experienced any losses related to these cash balances and believes that there is minimal risk of expected future losses. However, there can be no assurance that there will not be losses on these deposits. Accounts receivable are primarily derived from Advertising Partners located inside the United States. As of March 31, 2022 (Successor), two of the Company’s largest Advertising Partners, Google and Yahoo represented 73% and 9% of the Company’s accounts receivables balance. As of December 31, 2021 (Predecessor), these two Advertising Partners represented 72% and 10%, respectively, of the Company’s accounts receivable balances. Foreign Currency The Company’s reporting currency is the U.S. dollar. The balance sheet accounts have been translated using the exchange rates in effect at the balance sheet date. The statement of operations amounts have been translated using the average exchange rate for the month in which the activity related. Accumulated net translation adjustments and foreign currency transaction gains/losses resulting from exchange rate fluctuations on transactions denominated in a currency other than the functional currency were not material. Warrant Liability The Company accounts for the Public Warrants and Private Placement Warrants (collectively, the “Warrants”, which are discussed in further detail in Note 13 and Note 14) as either equity-classified or liability-classified instruments based on an assessment of the specific terms of the Warrants and applicable authoritative guidance in Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 480, Distinguishing Liabilities from Equity (“ASC 480”) and ASC 815, Derivatives and Hedging (“ASC 815”). The assessment considers whether the Warrants are freestanding financial instruments pursuant to ASC 480, meet the definition of a liability pursuant to ASC 480, or meet all of the requirements for equity classification under ASC 815, including (i) whether the Warrants are indexed to the Company’s own common stock and (ii) whether the holders of the Warrants could potentially require “net cash settlement” in circumstance(s) outside of the Company’s control, among other conditions required for equity classification. This assessment, which requires the use of professional judgment by management, was conducted at the time of issuance of the Warrants, and is conducted at each subsequent quarterly period end date while any Warrants remain outstanding. For issued or modified Warrants that meet all of the criteria for equity classification, such Warrants are required to be recorded as a component of additional paid-in capital at the time of issuance. For issued or modified Warrants that do not meet all the criteria for equity classification, liability-classified Warrants are required to be recorded at their initial fair value on the date of issuance, and each balance sheet date thereafter. Changes in the estimated fair value of such Warrants are recognized as a non-cash gain or loss on the Condensed Consolidated Statement of Operations. The Company accounts for the Warrants in accordance with ASC 815-40 under which the Warrants do not meet the criteria for equity classification, and therefore must be recorded as liabilities. The fair value of the Public Warrants has been estimated using the Public Warrants’ quoted market price. The fair value of the Private Placement Warrants has been estimated using the fair value of the Public Warrants. Fair Value of Financial Instruments The Company applies the provisions of FASB ASC 820, Fair Value Measurements and Disclosures , which provides a single authoritative definition of fair value, sets out a framework for measuring fair value, and expands on required disclosures about fair value measurement. The provisions of ASC 820 relate to financial and nonfinancial assets and liabilities, as well as other assets and liabilities carried at fair value on a recurring basis. Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability, or an exit price, in the principal or most advantageous market for that asset or liability in an orderly transaction between market participants on the measurement date. The Company measures fair value based on a three-level hierarchy of inputs, maximizing the use of observable inputs, where available, and minimizing the use of unobservable inputs when measuring fair value. A financial instrument’s level within the three-level hierarchy is based on the lowest level of input that is significant to the fair value measurement. The three-level hierarchy of inputs is as follows: Level 1 : Observable inputs such as unadjusted, quoted prices in active markets for identical assets or liabilities at the measurement date. Level 2 : Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; and Level 3 : Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. These inputs are based on the Company’s own assumptions about current market conditions and require significant management judgment or estimation. Financial instruments consist of cash equivalents, restricted cash, accounts receivable, other assets accounted for at fair value, accounts payable and accrued liabilities. Cash equivalents and restricted cash are stated at fair value on a recurring basis. Accounts receivable, accounts payable and accrued liabilities are stated at their carrying value, which approximates fair value due to the short time to the expected receipt or payment date. The carrying amount of the Company’s outstanding debt approximates the fair value, as the debt bears interest at a rate that approximates the prevailing market rate. The Company classifies the fair value of debt within Level 2 in the fair value hierarchy. The Company does not have any assets, with the exception of cash, cash equivalents and restricted cash, that are required to be carried at fair value on a recurring basis at March 31, 2022 (Successor) and December 31, 2021 (Predecessor), respectively. The Company’s liabilities measured at fair value relate to the former CEO of S1 Holdco's equity profits interest liability (Level 3), contingent consideration (Level 3), Public Warrant liabilities (Level 1) and Private Placement Warrant liabilities (Level 2). In January 2022, as part of the Merger, S1 Holdco settled the equity profits interest liability with S1 Holdco's former CEO. Certain assets, including goodwill and intangible assets, are also subject to measurement at fair value on a nonrecurring basis if they are deemed to be impaired as a result of an impairment review. The fair value of these assets is determined using unobservable inputs to present value the assets. Restricted cash The Company had restricted cash of $7,929 and $743 as of March 31, 2022 (Successor) and December 31, 2021 (Predecessor), respectively. The amount of restricted cash as of December 31, 2021 (Predecessor) relates to cash held as collateral at the Company’s financial institution to secure the Company’s letter of credit issued in favor of its landlord under the lease for its Marina del Rey, California facility. The Company’s restricted cash as of March 31, 2022 (Successor) primarily consists of (i) cash held as collateral at the Company’s financial institution to secure the Company’s letter of credit issued in favor of its landlord under the lease for its Marina del Rey, California facility, (ii) merchant reserve balances with its credit card processors held due to arrangements under which the Company's credit card processors withhold certain credit card funds to cover potential charge backs initiated by the Company’s customers, (iii) the escrow account balance related to the portion of vested equity awards as of the closing of the Business Combination that will be cash settled and will be released to the Company's employees as the service requirement is completed and (iv) the escrow account balance related to post-close adjustments and indemnifications from the RoadWarrior acquisition. Property and Equipment, net Property and equipment are stated at cost, less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the related assets. Estimated useful lives are three years for computer equipment, office equipment and software, three Internal-use software development costs, net Internal-use software development costs are stated at cost, less accumulated amortization. The Company capitalizes certain internal-use software development costs associated with creating and enhancing internally developed software related to the Company’s technology infrastructure, including continuing to develop and deploy its RAMP platform. These costs include personnel and related employee benefits’ expenses for employees who are directly associated with, and who devote significant time to, software projects, as well as external direct costs of materials and services consumed in developing or obtaining the software. Internal-use software development costs that do not meet the qualification for capitalization are expensed as incurred, and correspondingly recorded in Salaries, commissions, and benefits expense in the Condensed Consolidated Statement of Operations. Internal-use software development activities generally consist of three stages: (i) the planning stage, (ii) the application and infrastructure development stage, and (iii) the post-implementation stage. Costs incurred in the planning and post-implementation stages of software development, including costs associated with the post configuration training and repairs and maintenance of the developed technologies, are expensed as incurred. The Company capitalizes costs associated with software developed for internal use when the preliminary project stage is completed, management has authorized further funding for the completion of the project, and it is probable that the project will be completed and the software will perform as intended. Costs incurred in the application and infrastructure development stages, including significant enhancements and upgrades, are capitalized. Capitalization ends once a project is substantially complete, and the software and technologies are ready for deployment for their intended purpose(s). Internal-use software development costs are amortized using a straight-line method over an estimated useful life of three (3) years, commencing when the software is ready for its intended use. The straight-line recognition method approximates the manner in which the expected benefit will be derived. The Company does not transfer ownership of its software, or lease its software, to third parties. Intangible Assets Intangible assets primarily consist of acquired technology, customer relationships and trade names/trademarks. The Company determines the appropriate useful life based on management’s estimate of the applicable intangible asset’s remaining economic useful life at the time of acquisition. Intangible assets are amortized over their estimated economic useful lives using a straight-line method, which approximates the pattern in which the economic benefits are consumed. Certain customer relationship intangibles are amortized on an accelerated basis based upon the expected timing of economic benefits which are, derived from an analysis of customer attrition rates over the expected life. The estimated useful lives of the Company’s intangible assets are as follows: Useful Life (Years) Developed technology 4 Customer relationships 3 - 5 Trademarks and trade names 10 Other intangibles 4 The weighted average amortization period for all intangibles is 7 years. Impairment of Long-Lived Assets The Company assesses the recoverability of its long-lived assets when events or changes in circumstances indicate that their carrying value may not be recoverable. Such events or changes in circumstances may include a significant adverse change in the extent or manner in which a long-lived asset is being used; significant adverse changes in legal factors or in the business climate that could affect the value of a long-lived asset; an accumulation of costs significantly in excess of the amount originally expected for the acquisition or development of a long-lived asset; current or future operating or cash flow losses that demonstrate continuing losses associated with the use of a long-lived asset; or a current expectation that, more likely than not, a long-lived asset will be sold or otherwise disposed of significantly before the end of its previously estimated useful life. The Company performs impairment testing at the asset group level that represents the lowest level for which identifiable cash flows are largely independent of the cash flows of other assets and liabilities. The Company assesses recoverability of a long-lived asset by determining whether the carrying value of the asset group can be recovered through projected undiscounted cash flows over their remaining useful lives. If the carrying value of the asset group exceeds the forecasted undiscounted cash flows, an impairment loss is recognized and measured as the amount by which the carrying amount exceeds the estimated fair value. An impairment loss is charged to operations in the period in which management determines such impairment has occurred. Management has determined there to be no impairment of long-lived assets during the period from January 27, 2022 through March 31, 2022 (Successor), the period from January 1, 2022 through January 26, 2022 (Predecessor), and the three-month period ended March 31, 2021 (Predecessor). Business Combinations The results of a business acquired in a business combination are included in the Company’s condensed consolidated financial statements from the date of acquisition. The Company allocates the purchase price, which is the sum of the consideration provided which may consist of cash, equity, or a combination of the two, paid in a business combination for the identifiable assets and liabilities of the acquired business at their acquisition-date fair values. Any excess amount paid over the identifiable net assets is recorded as goodwill. The goodwill is non-deductible for tax purposes. The process for estimating the fair values of the acquired business involves the use of significant estimates and assumptions, including estimating average industry purchase price multiples, customer and service attrition rate and estimating future cash flows. The Company estimates the fair value based on assumptions which the Company's management believe to be reasonable, but which are inherently uncertain and unpredictable and, as a result, actual results may differ from estimates. During the measurement period, not to exceed one year from the date of acquisition, the Company may record adjustments to the assets acquired and liabilities assumed, with a corresponding offset to goodwill. At the conclusion of the measurement period, any subsequent adjustments are reflected in the Company’s Condensed Consolidated Statements of Operations. Transaction costs associated with business combinations are expensed as incurred and are included in Selling, general and administrative expenses in the Company’s Condensed Consolidated Statements of Operations. When purchase consideration includes contingent consideration, the Company records the fair value of the contingent consideration as of the date of acquisition, and subsequently remeasures the contingent consideration at fair value during each reporting period through the Company’s Condensed Consolidated Statements of Operations. Goodwill Goodwill represents the excess of the purchase price over the fair value of net assets acquired and identifiable intangibles in a business combination. The Company accounts for goodwill in accordance with ASC 350, Intangibles—Goodwill and Other , which requires the Company to test goodwill at the reporting unit level for impairment at least annually. The Company has the option (i) to assess goodwill for possible impairment by performing a qualitative analysis to determine if it is more likely than not that the fair value of a reporting unit is less than its carrying amount or (ii) to perform the quantitative impairment test. The quantitative impairment test involves comparing the estimated fair value of a reporting unit with its respective book value, including goodwill. If the estimated fair value exceeds book value, goodwill is considered not to be impaired. If, however, the fair value of the reporting unit is less than book value, an impairment loss is recognized in an amount equal to the excess. The determination of fair value(s) requires us to make significant estimates and assumptions. These estimates include, but are not limited to, future expected cash flows from a market participant perspective, discount rates, industry data and management’s prior experience. Unanticipated events or circumstances may occur that could affect the accuracy or validity of such assumptions, estimates or actual results. The Company tests for goodwill impairment annually at December 31st. During the period from January 1, 2022 through January 26, 2022 (Predecessor), the period from January 27, 2022 through March 31, 2022 (Successor), and for the three months ended March 31, 2021 (Predecessor), there were no triggering events identified, and therefore no impairment charges recorded on goodwill during the interim periods were required. Revenue The Company recognizes revenue when control of the promised goods or services is transferred to the Company’s customers, in an amount that reflects the consideration it expects to be entitled to in exchange for those goods or services. The Company determines revenue recognition through the following steps: • Identification of a contract with a customer, • Identification of the performance obligations in the contract, • Determination of the transaction price, • Allocation of the transaction price to the performance obligations in the contract, and • Recognition of revenue when or as the performance obligations are satisfied. The Company’s revenue is principally derived from the following areas: Advertising and Other Revenue Revenue is earned from revenue-sharing arrangements with the Company’s Network Partners for the use of its RAMP platform and related services provided to them to direct advertising by the Advertising Partners to their advertising space. The Company has determined it is the agent in these transactions and reports revenue on a net basis, because (a) the Company does not control the underlying advertising space, (b) the Company does not acquire the traffic and does not have risk of loss in connection therewith and (c) the pricing is in the form of a substantively fixed-percentage revenue-sharing arrangement. The Company reports this revenue on a net basis with respect to the amount retained under its revenue-sharing arrangements, which represents the difference between amounts received by the Company from the Advertising Partners, less amounts remitted to the Network Partners based on underlying contracts. The Company also earns revenue by directly acquiring traffic to its owned and operated websites and utilizing its RAMP platform and related services to connect its Advertising Partners to its owned and operated websites. For this revenue stream, the Company is the principal in the transaction and reports revenue on a gross basis for the amount(s) received from its Advertising Partners. For this revenue, the Company has determined that it is the principal since it has a risk of loss on the traffic that it is acquiring for monetization with its Advertising Partners, and, in the case of its owned and operated websites, the Company maintains the website, provides the content and bears the cost and risk of loss associated with its websites’ advertising space. The Company recognizes revenue upon delivering traffic to its Advertising Partners based on a cost-per-click or cost-per-thousand impression basis. The payment term is typically 30 days. Subscription Revenue In connection with the Merger of Protected discussed in Note 3, the Company is also engaged in selling security software as a service subscriptions to customers. The subscription business provides real-time antivirus protection, a safe-browsing feature, adblocking, identity-theft protection, blocking of malicious websites and data breach monitoring. Subscription revenue is primarily derived from the (i) delivery of the antivirus software and (ii) delivery of the additional add-on service(s), which all are provided on a fixed-price basis. The performance obligations related to subscription, maintenance and support are satisfied over the length of the relevant customer contract and the associated subscription revenue is recognized over the contract term on a ratable basis, which is consistent with transfer of control. The Company’s services rendered to customers are generally paid for in advance with cash receipts recorded as deferred revenue and revenue recognized over time, generally the annual subscription period. The timing of customer billing and payment relative to the start of the service period varies from contract to contract; however, the Company bills many of its customers in advance of the provision of services under its contracts, resulting in contract liabilities consisting of deferred revenue (“contract liabilities”). Deferred revenue represents billings under noncancelable contracts before the related product or service is transferred to the customer. The portion of deferred revenue that is anticipated to be recognized as revenue during t |