Gog, Microsoft, probably Funcom and a number of others (I'm not into gaming, I'm just pointing out he was extremely wrong, so wrong even I could see it. Or there is some missing context that I failed to see despite trying twice now in which case a clarification might be needed.)
Edit: Blizzard and Activision publishes outside of Steam (too)? (I don't know if the publish on Steam.)
Well they have all tried breaking Steam's dominance on PC. The ones that come closest are probably Microsoft (especially with their acquisition of Activision Blizzard) and Epic. Almost all of them still publish on Steam, because they basically have to.
Gog and Funcom are drops in the ocean in comparison.
Playstation, XBox and Nintendo all want a word with you first.
After that Fortnite and PUBG developers are waiting.
> Spotify has a near-monopoly on music,
ITunes wants a word with you too it seems.
> and both of these are working great for me as a consumer.
Good. That is because both Valve and Spotify know how vulnerable they are.
> Netflix had a monopoly, but now not, and it's shit.
Unlike Spotify they weren't humble.
They abused customers by enforcing the dumb rules of the film industry.
I'd almost say good riddance to them but it's not in me to enjoy others misfortune.