Here at RouteNote we have been really trying to think of ways we can help artists who give away their music for free. The best way to do this is to signup for a RouteNote account (which is free) and upload your free content and select the streaming stores as partners (Spotify, Rdio, Deezer, etc). This will allow artists to monetize their free content and build their fan base at the same time. This doesnt cost the artist anything upfront and they keep 85% of the royalties.