Meh, people who call other people sell outs are generally people who accomplished nothing themselves. So what if a band gets big and people like what they make? Should they, just to appease a small group of people tell a much larger group of people that they should listen to someone else cuz they are not industrial enough or something? That would make them arrogant elitist asses which is much worse then being a sell out imo.
Didn't the term sell-out start up with the punk scene? I think I remember reading about the Dead Kennedy's keeping their production quality shitty and cheap to avoid "selling out", or appearing to sell out.