In boxing's defense, the UFC had 4 more PPV's in 2006 then HBO did. And 2 more then WWE. So all of the PPVs got around the same number of viewers. UFC got 220 mil on 14 shows, while HBO PPV got 176 million on 10 shows. I'm not going to do the math but in my head I think that's an average of 16 million for both.