A Wall Street Journal investigation revealed that Polymarket relaxed its anti-money laundering controls, resulting in approximately $10 million in losses from stolen debit card deposits on its U.S. platform. Fraudsters exploited the weakened compliance measures to deposit illicit funds through compromised payment methods. The report indicates a direct correlation between the prediction market's reduced oversight protocols and the subsequent surge in fraudulent activity. The $10 million figure represents deposits made specifically using stolen debit card information during the period when AML safeguards were diminished.