Spotify should set aside X% of their equity and distribute it to artists. Each full play of a track would generate one 'artist' share. Then when they exit each artist gets their fair share. For example (to keep it simple I will use small numbers) let's say there are 100 plays in total on Spotify before they sell up, 1 of which belongs to Vulpeck (awesome band) then Vulpeck get 1% of X%. This way everyone gets paid fairly. The way it is now Spotify are basically monetising piracy. All the major labels have invested and are waiting for their pay day while the people who produce the content get shafted.