Why Sub-50ms API Responses Are Critical for Checkout: Stopping Codebroker Fraud, Single-Use Coupon Leaks, and SMS Abuse

https://qqpipi.com//index.php/When_a_Checkout_Delay_Cost_a_Growing_Retailer_Millions:_Javier%27s_Story

Checkout drop-off and fraud windows: why milliseconds change whether a sale is saved or stolen When a customer clicks "Pay" during checkout, the system has only a few hundred milliseconds to validate payment, apply discounts, and block abuse