UFC 202 sold a lot of pay-per-views. The rematch between Conor McGregor and Nate Diaz delivered at a level close to their first fight, according to MMA Fighting's Dave Meltzer. He believes that UFC 202 sold between 1.2 and 1.5 million PPVs, which would rank in in the top three highest-selling shows in company history.
After hitting one million buys just a few times before November 2015, the UFC has done it five times in the last 10 months - UFC 193 (1.1 million), UFC 194 (1.2 million) UFC 196 (1.5-1.6 million), UFC 200 (1.1-1.2 million) and UFC 202.
Meltzer also states that the press conference water bottle tossing incident generated a lot of late interest in the card. The gate was $7,629,010, fifth-highest in UFC history. But ticket prices were inflated due to McGregor's presence, so it wasn't a huge indicator of success. In fact, it is believed that the arena didn't sell out.
Nonetheless, it seems that McGregor and Diaz are continuing to be a huge success, so you know they're going to have a rubber match down the road some day.