It’s also possible that they can’t track new installs either. Or have not implemented anything yet, so they have no idea what properties it will have.
FAQ:
How is Unity collecting the number of installs?
We leverage our own proprietary data model and will provide estimates of the number of times the runtime is distributed for a given project – this estimate will cover an invoice for all platforms.
Which is some kind of weird nebulous BS.
They’re not saying their engine phones home and/or collects data from end-user devices. With the associated data protection nightmares.