Well, Valve funds Linux development and other than GOG, they run the only passable online game store. Idk if you remember, but you used to have to find a shop that stocked the game you wanted and then buy it from there. Steam and EGS have more or less everything, but since EGS is a Chrome instance running inside Unreal Engine 4, it's extremely slow. Yes, they managed to invent something worse than Electron.

Ubisoft, on the other hand, went from creating some of the most iconic games ever made, to pumping out repetitive garbage. Any individual newish Assassin's Creed game isn't bad, but once you've played Origins, Odyssey, Valhalla... You no longer feel like buying Mirage and Shadows.

I may be wrong, but there's sources saying Valve pays game and steam developers roughly 1 million dollars a year, hardware developers about 400k a year. Likely much of it in the form of profit sharing. They could hire 10x as many people and still be profitable, but what's the point of adding bloat to something that works? Over-hiring during good times tends not to end well for the people hired, nor the company's actual productivity.