The Craotian article said that Mirko is considering an offer from the WFA. The offer was made before the WFA put on their disappointing show though.
Mirko seems to be upset that if he makes it to the finals and loses, he would not be paid for the second match.
The fighters get paid for the first fight of the night win or lose. But in the finals match only the winner claims the prize and the loser is left holding the bag.
Pride needs to change that. No fighter should ever have to take a fight for free unless he wins. Especially not a main event fight, the main fight of the GP.