Their algorithm seems to favor music is cheap to play from an unknown artist and small label. One exception I noticed a couple of years back is that Pandora st

Their algorithm seems to favor music is cheap to play from an unknown artist and small label. One exception I noticed a couple of years back is that Pandora started playing Mumford and Sons on pretty much all of my stations. I like their music, but it is definitely not dubstep, so something fishy was definitely going on. That year M&S was Pandora's highest paid artist.