You’re just going to be punishing game devs who are locked in. Sure, make your own games with something else (although unreal has similar rev share) but it seems cruel to take this out on unity devs who have no option
https://www.gamesindustry.biz/unity-ironsource-malware-came-...
https://www.pcgamer.com/unity-is-merging-with-a-company-who-...
Not allowing developers to remove it from their games would certainly be a step too far (at this time anyway, who know what will they come up with in a couple of years).
The argument that I have some sort of ethical obligation to continue to support the likes of Unity because it would harm game devs if I don't seems specious to me.