I believe if you go down the rabbit hole of "mood playlists" and spotify created playlists, then you'll get a lot of tracks that they don't need to pay royalties for and that could probably include AI generated music.
If you are explictitly looking for music by specific artists, then you get their music obviously.
> then you'll get a lot of tracks that they don't need to pay royalties for
I love this conspiracy theory. Which track doesn't Spotify pay royalties for? Considering that it licenses 100% of its music from external distributors.