The Internet here is even less stable than normal, it'd be very difficult for them.
In an era where anyone can attach a card reader (not an E-card reader) to their iphone and run credit cards, that's not much of an excuse.
I paid $6 ($2 to my bank and $4 to whatever greedy atm deity rules over the convention center) for one atm fee because this thread specifically said that I could pay with card, and that was not the case.