Polymarket US Platform Hit by $10M+ Stolen Debit Card Fraud

The scale here is the story: fraud accounting for the large majority of deposits at peak suggests the platform's payment controls were not built for the speed of its US rollout, and the exposure sits with the card processor and issuing banks as much as with Polymarket itself. That matters for prediction markets trying to prove they can operate inside regulated US rails, where banking partners and card networks are the gatekeepers. Whether those partners treat this as a fixable onboarding gap or a reason to slow exposure is the open question.