I think many non-conformists (use any term you desire) have different aspects of their lives that they use to separate themselves from the flock so to speak, music being one of the most dominate. When a band is labeled as selling out I think many factors play a role. A person may label a band as selling out if they perceive a drastic image and/or musical change etc. etc. It is my opinion that there is however one lager underlying aspect. I think what truly upsets some when a band sells out is that they believe they have lost their means of separating themselves. In a sense the very people they despise have stolen something from them. I dont believe the act of the band selling out in and of itself causes all the resentment.