I just put the $2.50 back on it (and renew my unlimited) as I'm leaving at my destination.
I guess for those who don't ride enough for an unlimited to be worth it are gotcha'd this way.. I ride 20 times a week, though (break-even on a 7-day card is 12 times a week; monthly is 6.4 times a week. I tend to lose my card occasionally, though, and the hurt from losing a $112 card is a LOT higher than losing a $35 card. Yes, they have a recovery system. No, I've never gotten it to actually work).