I like that idea.. If someone clicks play, like, or favorite on the music player it sends a tip and also up votes the musician on charts (in the system). Of course the likes would need to be from different software clients to be valid.

I'm thinking also of the irony that services like Jango Radio charge you money to play your music, when legally they are required to pay you to play YOUR music. Which they do of course pay you - magnitudes less than they charge you to play your music. So you end up paying them much more just to have your music played, when really YOU should be the one getting paid.