Downvotes notwithstanding, the reality is that Unity is
not profitable. They
desperately need a revenue stream.
And sure, they should have gone with plain old revenue sharing from the get go ("we get X% of your sales, so if you sell nothing, we get nothing, and if you move 2 million units, we get an amount you can quite easily part with"), instead they came up with a batshit insane plan, and their CEO should have been fired already.
That doesn't mean they can backpaddle on the part where they need to put a sales-based revenue stream in place. Either they do, or they go out of business (which is an even worse deal for everyone. Folks seem to vastly underestimate how close to failing Unity was even before this debacle).
As much as people will want to go raise pitchforks despite these changes, reading through them these changes are actually massive. The part where it only applied to Unity 2023LTS and beyond is a HUGE change. It's aggressive, and and a grandfather clause for already in-progress games is clearly missing so fuck em, they have more work to do, but it's also nowhere near as insane as the previous arrangement. And it almost certainly won't be their last change as long as the dev/studio world goes "good start, but this is still unacceptable".