The Guardian: Mastercard and Visa are linked to illegal gambling sites accused of scamming UK customers out of thousands of pounds by processing their payments

Despite previous commitments to block transactions on unlicensed sites, Mastercard was available on nine such sites and Visa on two. Victims report significant financial losses, including inability to withdraw winnings and sudden account deletions. Both companies profit from these transactions, raising concerns about their compliance and the effectiveness of regulators…