Why No One Can Beat Steam

Why other services can have exclusive games that can only be played on their platforms, while others give away a bunch of crap for free every week, and still can't create any competition to Steam, which just... exists.

And the craziest part is that it all depends on one person. Of course, if you consider yourself a gamer, you know him, but I'm sure you don't fully realize how much Gabe Newell has influenced computer gaming...