[alwaysbeconsing]

I believe statement is about the playlist Spotify makes, not those made by user. Those called "Daily Mix", generated on user listening choices.

[Triphibian]

Yes, these are the suggested playlists. As well as the popular pre-fab playlists. A notable one mentioned was their "Ambient" playlist -- which favors in house ambient artists with much less generous royalty deals than someone like Brian Eno -- who is be the best known artist in the field apart from maybe Aphex Twin -- but easily replaceable with a no-name for some people apparenty.

[Triphibian]

I admire the testing you did on the random plays, I would have gone in on the same hypothesis -- that the "shuffle" would prefer lower cost plays.