tl;dr - Pink Floyd was in that business, actually, when it was still an active band. Pink Floyd used to routinely sell out everywhere - they almost define the

tl;dr - Pink Floyd was in that business, actually, when it was still an active band. Pink Floyd used to routinely sell out everywhere - they almost define the term "progressive rock". It's not fair to say they're not in the business of selling out Madison Square Garden - they're not technically in business at all anymore. They still earn royalties but David Gilmour is his own act now.