True, yet most users don't care about the details in any meaningful way. They just want to be able to use a convenient service like Spotify...who cares that they don't OWN the music anymore? Who cares that they don't pay artists as much as they could?

The only time it's a problem is when an artist doesn't release their music on a certain platform and it's now work to try and go download a second app, make an account, possibly pay a subscription, and THEN listen to the new album. These are the kind of things users actually care about, not whether the app/backend is FOSS or not.

HN is a power user community so it's easy to improperly extrapolate our experiences and what we tolerate to what "normal users" will tolerate.