For the people that do make their living off performing/mixing/producing; what's the most profitable distribution form for you? I don't necessarily mean format, digital should win (might not). Rather, if you put out a new album and there's a CD, amazon mp3, itunes, spotify, etc. Which of those gives you the most money back? I'm asking out of curiosity because so many good bands out there seem to struggle even when they're successful and if there's a method that gives them the most back I'd prefer to use it when I buy.