Variable-item cards at real pet-store scale
A manufacturer program may allow several flavors, sizes or related SKUs to count toward one free-product threshold. A retailer can have dozens or hundreds of those programs active at the same time, while one customer participates in several of them concurrently.
- Map multiple qualifying SKUs to one frequent-buyer package.
- Issue the applicable digital card when needed.
- Advance the correct card from the actual Square line item.
- Keep separate package progress for many programs and customers.

