Data point: I accumulate something like 7k Mastercard gift card from safeway $10 off next shopping promotion without read this thread, even include those celebrate MC gift card. I can't use them pay bill and buy money order in WM like VISA gift card. During short-lived HIGC spree, I used CELEBRATE version of Mastercard buy HIGC and liquidate them on the same day. I still have 4k MASTERCARD GC.

Today I came to walnart, no matter what kind of method I use, I cannot buy money order, pay bill I'm WM money center. But I did load 4 mastercard GC into my bluebird in ordinary check counter just now by waiting for 1am eastern time.

During over 10 times fruitless trying, it seems that only way to liquidate those mastercard GC is to load bluebird, but not in money center counter.