The main controversy is that they seem to intend to apply this to any new installs of any Unity game still available on the market as of 1/1/2024, including any that were already developed and released under different Terms of Service.

It even seems to include, for example, any reinstalls I might do of Cult of the Lamb, which I purchased months ago when it launched. That’s why Massive Monster’s response was to announce they’re delisting CotL to cap costs (and as a protest, of course).

All this says is that they won’t use historical telemetry data to retroactively bill you, and that every user install will only be charged for once.