I had up to 400k as the best case scenario but then I also thought it might do as low as 100k and bomb, so a relative success. I'd imagine the UK buys will add a few hundred thousand more too plus theres still other countries that had it on PPV.
Weird thing is for a fight that only got comparable US buys to a typical UFC event it FEELS much bigger, theres was/is definite buzz about it. Its getting referenced on talk shows etc, you aint getting that for Holloway/Ortega. Presumably a hell of a lot of people watched it through other more cost effective means, which would explain the disconnect.