We backed up Spotify (metadata and music files). It’s distributed in bulk torrents (~300TB). It’s the world’s first “preservation archive” for music which is fully open (meaning it can easily be mirrored by anyone with enough disk space), with 86 million music files, representing around 99.6% of listens.
So, you do get benefits from Spotify, don’t you? Besides, there are other streaming services around that supposedly pay better - as you said. Anyway, all good to you, hope you succeed and Spotify dies one day.