Streaming services are AWFUL for musicians. Especially indie musicians. Right now iTunes is fantastic for indie musicians.. Make a CD, upload it to iTunes, make 70%, which is quite frankly better than you do selling a CD in the stores.
Streaming services pay sometimes less than a penny per play, the revenue is allocated primarily to the big 4 and the indies get checks for $.63.
The only reason the other streaming and download services exist, is because the big 4 have cut insane deals with them in an effort to undercut apple, because they want to own a piece of every ipod sale. There is no reason when I sell a song on amazon, I get nearly half of what I get for a similar sale on itunes, except that Universal is trying to give amazon some of apples marketshare to remove Steve's negotiating power.
As an artist, I'm perfectly fine with the idea of selling someone my song for $.99, and letting them keep it stored on the server, and stream to whatever devices they own.. But the Zune/Rhapsody model sucks.
Songwriters really get hosed on streaming models.. With pay per download, the songwriter makes $.091 per download, simple, fair, and government mandated. There aren't any rules for now to pay songwriters on streaming, it's a nightmare.