On a related note, am I the only one who doesn't have a single clue what these 'trading cards' are all about? Some games seem to have them, it doesn't tell you how you actually get them (e.g. I've finished Bioshock Infinite but don't have any cards for it), but you can use them to craft 'badges' and get some seemingly useless extras. But you can also sell them it seems (based on the Football Manager one I've randomly received, despite not having FM) for pennies.
Is there some greater purpose for all this or is it just more crap Steam are adding?
with bioshock normally its because you played it before the card's were added to the game if u wanted some of them you would have to play it again