Why is there a CD key when a physical CD does not exist? Are they worrying about pirating a free download? I don't get it.
Possibly for handling user accounts using the same system as retail, so they can ban cheaters I guess. But I could be way off.
Information doesn't want to be free, it wants to be tied up and spanked. It told me so itself, in a naughty little whisper.
"The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts." -- Bertrand Russell (I think...)