Comment by thewebguyd

Except we are at a point now where you almost do have to sell on Steam. If you aren't already huge, you aren't going to gain much traction, if any at all, for your game outside of Steam.

I remember when Steam launched, it was rightfully met with hostility. Somehow Valve managed to completely win over gamers, and they do good work, but lets not forget that they are quickly approaching monopoly status. Just because someone could sell on some other store doesn't mean it would be profitable to do so because of Steam's userbase.