Really? I care how Spotify is encrypted. I can't get a 3rd-party player to play Spotify over the cell network with ads, just like the desktop client does. If I use their player I get an inferior Pandora-style radio. Similarly, even with paid streams I'm stuck with their client, like it or not.

Conversely, I know of old school internet radio stations (shoutcast/icecast style) that charge for high bandwidth streams. I can play those streams on any player I want, over any network I want.

No-DRM is better in all cases.