It's very hard to say. There was a study that said the UFC's avg age of viewership has skyrocketed high, like into the 40's. But I believe that is very much misleading. This is a sport that is very internet driven and young adult driven. Young adults today grew up in an age that they know how to get shit for free. So I would say many of the new fans of the UFC probably stream a majority of the PPV's. Where as the older fans buy some, watch at bar, or learn to stream. I think they have very few fans that hang around for many years paying for 5+ PPV's per a year anymore which is big reason why the dip in PPV buys.