If it turns out that WM has found a way like the USPS did to disallow all debit GCs, it'll be game over for a lot of MSers. Hopefully, this trickles s-l-o-w-l-y to all regions so many will have time to finish their MSRs. Once GCs are hardcoded into the system, there will be no more YMMV depending on cashier/friendly stores. It'll be just like USPS where using GCs went dead overnight.
Meanwhile, it's time to look for other recycling centers for those who wish to proceed loading and unloading GCs.