Except FOSS explicitly implies the user is free (as in freedom, not 0$), and the software isn’t a product or service, but a tool.

That line only applies when a non-free service or software that’s supposed to be meant for profit doesn’t have a clear money income. Don’t compare “oh how generous is google for giving me free email and drive for no shady reasons at all” to “i host my own email and cloud using foss projects”.

Also, windows is basically spyware with a bit of unoptimized OS on top and you still (should) pay for it.