They don't need to be obscene - I think a good example would be non-sparring martial arts like Aikido or Tai Chi. There isn't really an incentive to pay to wat

They don't need to be obscene - I think a good example would be non-sparring martial arts like Aikido or Tai Chi. There isn't really an incentive to pay to watch top performers in the arts demonstrate technique beyond a handful of people wanting DVDs. There's zero stakes because you aren't competing against another person to be "the best". BUT, the physically can also be a turn off to many people. The joke I was taught was "to make a small fortune, start with a large one and open a dojo". The martial art business model therefore is pretty small scale - kids classes, seminar fees, clothing and equipment sales, that's about it. But none of those things are really going to make you super wealthy because the non-competing aspect removes a lot of that business-oriented focus.