The next step in this, of course, is Spotify just generating music on the fly algorithmically based on your choices. Skip the middleman, so to speak. Maybe it is Spotify behind it?
I heard a similar story a couple of years ago: some no-name artist with a fairly good amount of plays on Spotify who could not be found anywhere else online. It was less obviously ai-generated back then (more instrumental than vibe/ambient), so it was speculated that it could be a musician working on commission for Spotify, who was then stuffing their playlists with these songs to cut costs. I can't find any traces of this story anymore though.