DJ should be on more IMO, I know he doesn't have that many fights but he's Champ, the face of his division, has been at the top end of his division for a while now and is quite simply, a sublime fighter to watch.
He also has the pressure of advertising the smaller fighters, Dana still needs to push these lower weights in popularity, it's still a working progress for the average fan... DJ is doing more than his fair share. And Dana loves the lower weights!
DJ is something very special and important as it is not to spoil him, it's important to treat him. Keep it sweet, so to speak. Regardless, he should have been top paid on this card. I imagine the kid gets a lot of secret bonuses, don't trust these pay reports really.