Short version is they’re making it so every time someone does a fresh install of a game made in Unity, Unity is going to charge the developer. It’s preposterously insidious and incredibly bad for indie devs.

Here’s a good article about Unity going down the shitter: https://www.gamedeveloper.com/business/the-death-of-unity

The most recent debacle is that Unity announced that developers will have to pay a fee every time a game is installed. This seems to include re-installs or pirated installs as well.