When it comes to PPV buy rates we never really get disclosed true and accurate figures. However the one reliable and lone source for UFC pay-per-view figures has and always will be, Mr. Dave Meltzer.
When people talk of buys, stating this PPV did this amount and this one did that, it is all based on his industry intelligence. The UFC never confirms figures, nor do the broadcasters, however, Meltzer’s time in the PPV business has gone on way before the UFC existed and therefore his estimates and contacts are widely considered as valid and on point.
With that being said, here is what he said via MMAFighting.com about UFC 175:
The show is estimated a doing between 500,000 and 545,000 buys based on various cable sources. It would be the largest number since UFC 168, also headlined by Weidman and Rousey, that was one of the few shows in UFC history to do in the 1 million buy category.
Weidman retained his title in the July 5 main event from Las Vegas, with a five-round win over Lyoto Machida in one of the year’s most exciting fights. Rousey ran through Alexis Davis in 16 seconds, which tied for the second-fastest title fight in UFC history. The show did slightly above most expectations going in.