One of my favorite games in Itch.io, Touhou Fumo Racing, is made in Unity. I'm gona keep safe in my own repository the latest version of the game.
That is the aspect of all this that worries me most. I have not dug deep, but how do they plan to track all this stuff? Do projects that meet the threshold get a mandatory addon for installation tracking? Will there be an eula we have to agree to even play those games?
Because there are things that would be quite illegal under current privacy and data protection laws. And tracking is only possible via phoning home. Tracking sales is trivial. Tracking installations for drm free games is inherently impossible. Because it would constitute drm. Granted, this would hurt the developer in theory, but once there is infrastructure for all this, there are all kinds of things, those nice Unity CEOs might come up with to upsell to naive developers.