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DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) segment | Sep. 30, 2024 USD ($) | Dec. 31, 2024
Concentration Risk [Line Items] |  |  |  |  |
Number of reportable segments | segment |  |  | 2 |  |
Advertising costs | $ 137.4 | $ 81.9 | $ 347.0 | $ 221.8 |
Selling and marketing expenses not directly related to a revenue generating transaction | $ 232.2 | $ 234.4 | $ 647.2 | $ 697.9 |
Minimum |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Settlements receivable period (in days) |  |  | 1 day |  |
Maximum |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Settlements receivable period (in days) |  |  | 2 days |  |
Third Party Processor One | Settlements Receivable | Credit Concentration Risk |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk (as percent) |  |  | 41.00% |  | 42.00%
Third Party Processor Two | Settlements Receivable | Credit Concentration Risk |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk (as percent) |  |  | 14.00% |  | 17.00%
Third Party Processor Three | Settlements Receivable | Credit Concentration Risk |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk (as percent) |  |  | 15.00% |  | 13.00%
Third Party Processor Four | Settlements Receivable | Credit Concentration Risk |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk (as percent) |  |  | 11.00% |  |

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