I have to respond to your point, though. Whether 30% cut is excessive depends on whether devs feel like they are getting a good deal. As far as I can tell, game developers don't seem to complain about Steam cut very much, it seems like the value you get is worth it.

For example, this thread https://www.reddit.com/r/Steam/comments/10wvgoo/do_you_think... seems like majority is positive about it, even though people debate. When Apple tax is brought up, there's almost never even a discussion there, it's pretty universally hated.

Apple seems to have almost adveserial relationship to its developers. I deploy to App Store and I feel like I'm getting screwed. Even compared to Google, which takes the same cut, but does bahave a lot more nicely to its developers.