Genshin is one of the biggest games using Unity right now, and I doubt Mihoyo would want to take that risk of suddenly having to pay millions of dollars for no reason.
I install it every 6 months or so to check if android controller support has been added. I expect many other people do the same. It’s just a drop in the bucket, but that bucket eventually fills up
Giving people an exception for using their ad service shows they’re happy to apply the rules unequally. I expect a company that is a big litigation risk like mihiyo will be happily exempt from the runtime fee
Laws and terms are for the poor. I am sure big players like miHoYo, Niantic and Game Freak (Pokemon Go/Scarler/Violet) already have their own agreements and would not be affected by this.