...A monopoly prevents competition. Valve hasn't. What exactly do you think that they have monopolized?
Try finding a copy of Napoleon: Total War, Civilization V or Half Life 2 that doesn't require you to use (or create) a Steam account. That should refresh the memory of what a monopoly is.
After you saying this, not sure why I am responding to you, cause you don't know what you are talking about obviously.
So Securom, Starforce, Tages, Games for Windows Live, all must be monopolies.
You don't know what a monopoly is.
