Unity: We have to charge for every install because we only see totals. Also Unity: We can tell which install is which, so you won’t be overcharged.
Well it kind of is. Either they can differentiate between a new install and a repeat install, or they can’t.
It’s also possible that they can’t track new installs either.
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.