Comment 1:

https://www.yankee-bookmarkings.win/hardening-retail-coupon-systems-a-30-day-plan-for-fixing-inflexible-tools-and-stopping-fraud

Comment 1: Look, I’ve been through the POS integration wringer using Square for a mid-sized apparel chain. Here’s the thing: on paper, their API looks solid, but when you combine inventory sync with multiple locations, you hit weird race conditions