Originally Posted by cdoublejj
I don't under stand the cards at all. surely they have no value when every one has one. unless they get me free games why else would i want one?
I could be completely wrong, but I believe you earn these playing cards by playing specific games that support them. You can put each card up for sale on the marketplace and get some Steam cash if someone buys them (if someone knows how much you can get per card please let me know cause I have no idea). I believe you can also trade them with friends. I think the object is to create a whole deck for a specific game and that will allow you to create a badge.
What i don't understand is, why in the world do I care about having a badge? I'm sure you can sell it for more than single trading cards alone, but unless it's super rare, I don't see how much it could possibly be worth...?