I'm sure they've made far more money than they could have ever fathomed. If people still think they are sell outs, look at that train wreck they did with Lou Reed. That sold what, 4 copies??? At this point, if fans are still showing up to shows and buying their music, why stop? Metallica has been in my life longer than they havent. It's somewhat of a sad prospect to think at some point they will call it a day and no new music will come from them.