Unsolicited opinion: Ok, fine, but music discovery algorithms are one of the coolest things to come out of the Internet. When Pandora first launched, it was mind-blowing. Now it's commonplace. I've found so many good artists on YouTube, Bandcamp, and the like (don't use Spotify). I don't know how they work, but I'm pretty sure they also take user engagement into account, so I wonder if this is really doing anything novel or just marketing.