22nd December 2013, 7:58 PM
I'm actually pretty sure that selling those cards violets some section of Steam's user agreement, but the thing is simply too labyrinthine for me to bother reading it to be sure. Better to be safe than sorry.
"On two occasions, I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question." ~ Charles Babbage (1791-1871)