From the opinion piece:
Last year, I pointed out how many big publishers came crawlin’ back to Steam after trying their own things: EA, Activision, Microsoft. This year, for the first time ever, two Blizzard games released on Steam: Overwatch and Diablo 4.
No? You can still buy these publisher’s games from them if you prefer and, as far as I’m aware, steam doesn’t have any stipulations that state once you sell on their platform that you can’t do so on others. In fact, that’s what these publisher’s tried to do. They thought they could easily build their own competing storefronts and reap the money. And, as the article says, they’re now crawling back. Turns out, Valve is pretty good at content delivery while remaining relatively consumer friendly.
More people should look up what a monopoly is before hosing everything with that label.