@Xavier Coiffard I did a little bit experimentation in that direction. I had a "Put your band on the Music-Map" link to Patreon where I have an article for members on how to do that. And I talked to artists about their interest in having their YouTube videos or Spotify songs featured. I saw basically zero interest in it if it involves a payment. To me, it seems that artists are not interested in paid marketing.

@Xavier Coiffard Interesting. Maybe that works because artists can directly see the popularity of a playlist? I would surely be interested to see his sales funnel.