Mayweather made $250 million for his biggest payday vs. Manny Pacquiao in 2015. The McGregor fight is tailor made to help the undefeated great meet loftier expectations, as it will bring the UFC viewership together with Boxing's viewership on August 26. And Mayweather is putting it out there that once he's gotten the job done and he's handled his obligation to the press and freshened up, he'll be looking forward to raking in another $300,000 during the fight's after party at his Girl Collective strip club