I'd be wary of their autobid system. Say on FF13 you throw down a high bid of $15, but it's not shown until somebody else bids you up, just like on ebay. Well then, do you have to pay for an incremental bid each time somebody bids and pushes you up a few cents?
Also, what prevents shills from coming along at the last minute to keep extending auctions another 30 seconds and to possibly squeeze out more of your "bid credits?" In this program you have the potential to lose money continuously and never win an item...Epic Game Bids would never have to sell an item to anyone other than an inside man and could be raking in cash from suckers the whole time.