Here's a comment on MMS I came across:

Try to find an older store with an older type register. It’s a little secret I learned as to why, in some cases, you are not able to purchase VRs with CCs. If the store has the updated technology, i.e newer registers, it is able to recognize and block pre-paid and loadable cards as cash items only. If the store has the older registers, like most CVS stores do, you have no problem, (except for the clerks who may flat out refused to even try). At Walgreens, forget it, most of their registers are upgraded, at least I’ve found them to be. So even if the clerk wants to do it, they can’t.

If the information is correct, then I think we're in trouble, since it will only be a matter of time until the old cash registers get upgraded, and the new ones don't allow CC payment.

Thoughts? How much longer do you think we can play?