He's proven to be a big draw. His fight against Rampage was the biggest non-title fight draw in UFC history. Bones's biggest drawing title fight was against Rashad too. And I'm sure some of Rashad's fights against guys like Chuck, Forrest, and Machida did well too.
If Rampage has made 15 million in the UFC, I'm sure Rashad has made that much or more since he has more fights. Plus all the sponsorship money etc. So yea Rashad doesn't need to be fighting for money at this point.