Huh, so Unity has reached the killing-the-golden-goose point of their enshittification: https://www.gamedeveloper.com/business/unity-to-start-charging-fee-pegged-to-game-installs
20c per install doesn't sound like much to PC users, but that's potentially enough to nuke mobile gaming entirely. Which they know, because they also run the stats system mobile devs use to calculate ARPU/ARPPU.
Unreal taking a small cut of revenue works fine. That's based on you know, money you made.
Unity charging based on "Installs" might actually cost you money in mobile space. Or if you do a PS+ freebie. Or GamePass. Or especially an EpicStore freebie. They know what they're doing, and it's fucking evil.