Straight from Castle Age!
Dominion Official Release
Dominion Officially Open, Beta Phase Now Closed.
Dominion has left its Beta phase and has now entered it's official release. Entry will now cost 5 FP and you will now earn rewards. We have many ideas going forward, including seasons, and plan on adjusting the feature according to community feedback.
For more details and to leave your own feedback please read the following thread: here