“We learnt that 15% of the successful fraudulent charges resulted in chargebacks. We decided to accept all of the disputes and swallow Stripe’s £20 fee for each.”
Card testers ran stolen and generated numbers through a SaaS checkout, and some went through. American banks approved charges where only the card number was right. Stripe Radar scored most of them 0 to 5, low risk. The bank says yes, the network takes its cut, and the merchant pays £20 a dispute for someone else’s failed check.