It is exactly what it says, swat? to sell stuff for money, lets say tf2 items or whatever (if that is possible), you have to provide steam with your billing address (incase they need to send a receipt or something. happens rarely though). and to give them your billing address, you have to buy something or fill money on your account
I see. I just didnt know this whole steam marketing thingy... I did not know that you could sell game copies to other people.
Will it ever end? Was empty last night, woke up to find... EDIT: Dumped em all onto poor old bobbeh :rdevil: