Depends what you call selling out and what you class taking advantage of an opportunity. When they did X-factor there was talk of selling out but it's the biggest music show on TV in the UK so it probably wasn't a bad idea to go on there. Is raising the price of tickets and writing about the economic crisis selling out or blatant hypocrisy? I don't know but some other bands have sold out more than Bon Jovi have, such as Metallica that you mentioned.