They don’t. Last I checked, Valve takes 30% or less (depends on the product’s sales)

1. It looks like this website hasn’t been updated since 2020.
2. Most of the things here are (probably) patched, besides many developers have claimed the right to update their own apps, and those apps are verified (a new feature created in 2023).
3. Before uploading an app that requires home or host filesystem access, developers must specify the reason.
4. Ever since xdg portals became a thing, I have seen more apps switch to them

Can you please explain what “userspace” means? Because my win11 install constantly tries to add new apps to the start menu