Do you not know how Pay per view works? It's in the name. I'm not trying to be a dick but a Mayweather fight can generate 1 billion internationally. A demolition violent race I imagine would generate tons of money as well. Not sure the angle you're coming from but if you think humanity doesn't appreciate violence I think you'd be sadly mistaken. Factor in the vengeance and that these people are officially sub human monsters of society I think many people would throw their morals put the window in case of an exciting demolition race.