According to The Wall Street Journal, predictions that market platform Polymarket’s U.S. business faced a large-scale fraud attack in February this year. Criminals used stolen debit cards linked to accounts in an attempt to transfer at least $10 million through betting and withdrawals. At one point, the payment processor judged more than 80% of the deposits it handled as fraud and rejected them, far above the roughly 1% industry norm cited in the report. Insiders said that after employees reported the risk to CEO Shayne Coplan, Coplan responded that the company should continue to grow and pay fines only if regulators found issues. Polymarket said the company has established mechanisms to identify and respond to suspicious activity and is committed to working with regulators and law-enforcement agencies.