No doubt that they'll continue even if Dana White says so.
There's a huge money that's being involved and they might have been offered with an amount that's hard to decline. Just like any other athlete, when is being offered with good compensation and talent fee, they won't think twice but will grab the offer.
The Paul brothers did discovered this niche that will make them and their opponents big money.
Dana is losing contracts as more fighters actually get off from Dana's control. Nate Diaz also was to fight against Jake but of course, Dana didn't like the idea and the contract also does not allow UFC fighters to have another event involving his fighters.
Those that are under contract, they have to honor and recognize their contract with UFC. But those that are clean and good to go, they don't have to listen whatever Dana is telling them because they no longer have contracts with him.
Unfortunately, UFC fighters losing against Jake embarrasses UFC. It would mean this combat sport is not really as ULTIMATE as it may sound if that is the case.
Still, many understands that these matches aren't really that pro unlike UFC. And this is just all about having fun and entertainment while making some big money from the hype it creates.