I am a subscriber of Spotify, because I follow the "This Week's Releases" playlist of jlarome. It is some kind of ancestor of the automatic algorithms, but I always find some interesting new stuff in genres that I rarely listen to, otherwise. cf https://open.spotify.com/user/jlarome/playlist/6KErOvRQFEAnY... (and https://open.spotify.com/user/jlarome/playlist/6CfIDri6dejaB... for "Last week's releases").