Live music is a strange form of entertainment, if you really stop to consider it. As an audience member, yes, you pay for the privilege of being entertained by a band or performer whose works you enjoy, and yes, ideally, these performers earn something in exchange for that work. But to get on stage and run through your most known songs, night after night for months, sometimes year after year, is a strange desire. It would seem to me that for most musicians, for whom private jets and sold out stadiums aren't the norm, the promise of payment isn't generally enough -- as cliche as it sounds, you really have to do it for the love.