It comes with the territory, and soon every sport could be pay-per-view.
The Mayweather vs. McGregor fight is expected to generate revenue from everything from pay-per-view to advertising slots on Mayweather's boxing shorts and robe.
Boxing's mainstream glory days pretty much ended when Don King and Mike Tyson got involved. Networks no longer wanted any part of it. So, in many ways, boxing owes its survival to pay-per-view, which has allowed it to tap a small but dedicated audience for a high price.