That was my thought as well, since they count installs and not use count of bought copies directly from a platform.
What if people create cracks for legit purchased games, e.g. on Steam, which only removes the Unity tracking part?
A simple Firewall rule which "fixes it" for all games installed on a machine might work as well?
I believe it might be similar or the same procedure for every game using Unity. We might see this popping up at some point.
There seems to be some misunderstanding here. The text marked in the screenshot is if you move from the beta version back to the public (stable) version.
Getting into the beta for a new app is nearly instant and allows you to install it right away.