two reasons!
1- I thought it was really funny to have a steam sucks sale. Like, it still makes me laugh.

2- To put a game on steam you have to$100, and if you don't sell over $100 worth, you don't get any $$$ that you rightfully earn. They're basically using indie game developers as a bank, with 30 new indies games being uploaded to steam every day. That's an insane amount of money they're earning per diem on games even if they never sell a single one...

And that's low. They use bank fees blah blah blah as an excuse, but that's BS. No one else does that. Not Google Play, not Itch, not Epic, etc.