I sell lots of songs through Spotify as streams. But unless you are really big and selling millions of them, there is not money in it. But, if the system were made fair for musicians and the product was more robust that just a song on the either for however long the song lasts, that would be a good thing. We’ll see. Spotify has many lawsuits against it pending. Hopefully results in favour of the art and not the artifice are on the way.