With the help of the Spectran, Lone Shadow, the World Elemental, and everyone else, defeating the other Primordials had been rather easy.
This might have been because the Primordials' strength had been restricted but nearly everyone had been drastically weakened. The Primordials may have been at a disadvantage nonetheless, but that didn't really. At the end of the day, only the result mattered.
The result was that Dilan had come out victorious and that he could open the Gates to everyone, who deserved to emerge and live on Milarn.
For the time being, he restricted the entrance for everyone who fought against him and his allies but that was just a way for him to make sure that everyone received the punishment they deserved.
As for the distribution of the rewards, it was not Dilan's job to do so. He would just give everyone what they deserved according to the negotiated contracts. If the contracts were unclear he would tell others to take care of this problem.