I see you're getting a lot of flak for this Kleidophoros, but I agree that it's Steam's fault. They might have run out of keys, they've done that before. It's the only thing I've heard that makes sense, because before the sale people had no problems getting the right keys. Just gotta sit back and wait for them to fix it. At least you can still get your character to level 7 in the demo, that should probably tide most people over until the problem is fixed.