That's a fair point too, tho Diaz always said he would be a star if UFC let him main event and gave him promo. His ratings were always good, but not super star good. I guess, in a way, that turned out to be true when he sold 600k more PPV's than Aldo Conor and 400k more than Conor Eddie.
I've a feeling as a main eventer, after getting the Conor shine, he sells better than any current UFC fighter (save Brock, GSP, Conor, Jones/DC grudge match) but still only nets around 500 k PPV's at most. Only time will tell. Will be interesting how the PPV sales are affected if UFC puts some chick fight as the headliner, as I'm positive headlining with Nunes hurt Brawk at UFC 200.