If it is not Nate, and it is not GSP, Conor, Ronda or Brock, then it is business suicide. Whenever the UFC promotes less know. fighters to the main, it always hurts the PPV sales. When my Dad browses thru the listings to decide if he will order the UFC's, he just sees the headliners "UFC 178: Johnson vs Carioso", not having the time to browse thru Sherdog and see Conor is on the card, and passes. Doing this at 'UFC 200: Amanda Nunes vs Meisha Tate' hurt them too, as the card barely broke 1 mill PPV's and not only was the bi-centennial event but had DC vs Silva, Aldo vs Edgar and Brock's return, which in itself should have drawn well over one million.
And for reference to show you how retarded the fucking belts are in terms of PPV sales: the two highest grossing events of all time were Conor's only non title fight bouts. People who buy pay per view could not give a bollox about belts, they want the stars at the top and to know the stars are fighting when they quickly browse thru and decide what to do with their night.