Here's a freebie for Spotify and Rdio: Allow artists to sell their merch from your app/website. It would engender a ton of good will from artists. It might even

Here's a freebie for Spotify and Rdio: Allow artists to sell their merch from your app/website. It would engender a ton of good will from artists. It might even help your margins (which I imagine can't be too huge) too. If they don't do that, there's a startup idea for someone.