The way I look at it, it was Mayweather's idea to use OST so if doesn't test that way before a fight he would be a hypocrite. Pacquiao and the rest of his camp have no issues with the way things are run now so there is no need for them to start doing OST before their fights. Either way, arguing about the whole thing on the internet is stupid because debates never solve anything. People just stick to their side even more