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.
I’m guessing this is more about preserving culture and art. I find it unlikely that this post would be someone’s first clue that they could listen to music for free, and listening to music out of this dump would be way harder than any other method.
You underestimate people and their motivation to listen for free no matter what.