Him not knowing who Ronda Rousey is would not be out of the ordinary at all, I'd be more surprised that he DOES know who she is. I'm pretty sure his life is busy enough that he doesn't spend time peeping the UFC women's division.
He might or might not
but the UFC actually showed Mayweather respect they could feed off his fame and boost up their sport by having attend events, come on the Ultimate Fighter and show guys boxing techniques
the whole bash mayweather shyt is just dumb and shows you Dana white is a terrible business mind and lucky to have grew up with two guys who became billionaires