you have how many networks just for one thing, MANY, each is drawing a small crowd but it adds up, golf channel, food channel, one for cars, one for cartoons, one for game shows, and on and on
as far as 70,000 people watched a fight, your not talking about ppv because its a lot bigger than that. just go an look at the tv rating for the ultimate fighter. thats a one hour once a week show on spike, it draws big time numbers.