They clarified it will only be initial installs. Depending on how they’re uniquely identifying that, I guess it could still be gamed though.
They backtracked.
https://www.axios.com/2023/09/13/unity-runtime-fee-policy-ma...
> After initially telling Axios earlier Tuesday that a player installing a game, deleting it and installing it again would result in multiple fees, Unity's Whitten told Axios that the company would actually only charge for an initial installation. (A spokesperson told Axios that Unity had "regrouped" to discuss the issue.)
This is an important distiction.