I think the big difference is Valve isn’t really in control of many of the projects they’re funding, they’re mostly just bringing in existing maintainers as contractors and letting them work on what they want.

Chromium on the other hand has always been something Google has explicitly been in direct control of.

Ultimately the EGS has shown 12% is not profitable, a lower cut would be nice for smaller devs but I don’t see why Valve would when every other platform of Steam’s size also takes 30%.

It’s entirely for Fortnite, they bought entire studios like Harmonix and turned them into Fortnite game mode developers.