This sounds like the "birth" of most sports. At the start, there was little money to go around...then as the sport grew, the athletes enjoyed the fruits of their success...now it might be time for the athletes to realize that they the 'stars' of the sport and hold more power in their hands.
I wonder what would happen if collective bargaining allowed the fighters to a certain percentage of the gross and then it was divided up in a fair and equitable fashion? Could be based on ranking or drawing power.