The rules of Unity Engine have changed.
On September 12, Unity announced a new Runtime Fee based on above certain thresholds, annual revenue and game installs, starting January 1, 2024.
For instance, if an indie developer uses the free Unity Personal plan, getting $200k in revenue and 200k downloads in the last 12 months, then Unity company would charge $0.20 for every install above the threshold.
In fact with this announcement, Unity has becomes the enemy of indie game developers for many reasons.
Unity forum thread
The following official Unity Forum tries to explain common questions / answers to this unlucky Runtime fee:
If same user uninstall / reinstalls one videogame in multiple devices, it will that count as multiple installs? A: Yes. The creator will need to pay for all future installs. The reason is that Unity doesn’t receive end-player information, just aggregate data.