Why POS Systems Fail When Connecting to Large Rewards Catalogs

https://xn--se-wra.com/blog/replace-rigid-coupon-engines-a-step-by-step-guide-for-technical-decision-makers-at-retail-10428

When a point-of-sale (POS) terminal suddenly starts rejecting coupons after a rewards catalog expansion to more than 2,800 items, it feels like the store's checkout plumbing burst. The error doesn't announce itself as "catalog too big