A few stores we absolute in the 2 promo limit, then another store was totally cool about it. Ya, it was $100 GC's, so a bit of a pain in the ass and not a money maker like the $200 GC's, but still a break even and points. The MC's work fine at the WM register, you just need to hit the change payment button (or something similarly worded) once it pops up, then choose debit.