I just signed up and I've actually added a bunch of games to my library. I think I'll end up making full use of their service, is there a way to earn more trade credits without having to actually pay, like promotional events or something? I know you can earn points by referring people who make successful trades, but the credits are $1 a piece, even though in the end it's probably still cheaper than Ebay.
Also, are the credits only for when you purchase a game? You don't have to pay $1 every time you sell a game do you? I just shipped out my first game today, and I'll probably be shipping a 2nd one pretty soon.
Edit: One more question, where would I go to check my private messages?