FD release numbers of units sold. This is public info for shareholders.Steam is where we can actually see numbers. FD has never told us the full numbers. Ever.
Is it possible on Steam to see number of game owners? I honestly don't know.
If it is possible then it should be easy to extrapolate number of players across all platforms. Maybe? I'm just thinking out loud but not thinking too deeply, it's hot and sunny in my garden

