Cross-platform discount models still leave structural promo leaks

[onspotrepair4u-lgtm]

Context

DiscountKit’s universal discount model + Shopify/BigCommerce/Woo/Magento adapters is the right layer for discount definition fidelity.

Gap

Even with clean discount APIs, stores still leak margin via catalog/checkout structure (dead collections, OOS buyable paths) that amplify every promo.

Complementary

Tillkiln structural leak scan with monthly estimates: https://tillkiln.com

Different layer than DiscountKit — hygiene pass next to discount logic.