I got a giftcard for Christmas for $15, which is cool so I can get "free" subs. I've gone to two different ones and for some reason their card readers have trouble reading the gift card but have no problem reading my credit card. I'd complain about it more, but the only ones here are run by Indian people who basically know enough English to operate a cash register and make sandwiches and they just say "you can pay with money." I've done so, but it annoys me that I have Subway fun bucks that I can't spend anywhere else and I have to spend real money on my sub.
Normally I would but I was getting the food to eat with my girlfriend on her lunch break, so by the time I left and went somewhere else, she'd be off break. Ethically I also don't like wasting food. I know it doesn't make a big difference, but it bugs me to have them just throw it in the trash.