Spotify seems designed to over-reward the high volume artists at the expense of the little guy assuming I understand their model correctly.

Current:

     totalMoney x (totalListenTimeForArtist/totalListenTime)

imo the sensible system looks like:

     PerUserMoney x (PerUserListenTimeForArtist/TotalUserListenTime)

ie distribute each users subscription (minus fees) across the artists they list to so they don't just get dominated by big/popular music on repeat