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.
They have had a dozen or more lawsuits/police actions against them. They are already enemy #1 in piracy terms, so I expect they are okay leaning into it and doing more good for the world.