That's what it means when y'all worry about Gabe having a heart attack.
That's irrelevant to any monopoly status. "I like thing, I hope owner of thing doesn't have a heart attack so I can continue to use thing."
Here, let me save you a lot of time in the future:
"Legally speaking Steam qualifies as a monopoly due to its market share. Also legally speaking, being a monopoly because your competitors suck is completely legal."
That gets people to the point you're trying to make a hell of a lot faster than whatever this was.