Giveing only few days duble exp with limited time zone is kinda useless. Logically it shoud be 24h. But i think what we say in forum doesnt go to game developers ears, so it means forum admins dont care or font know english or devs dont resive what we write, or they dont compleatly care.
If i woud be game developer, i woud want that every single player coud be able to attend at every event, promo events woud be only for very passionate players.
They shoud hire a player to play and tell whats wrong with this game, in forum everything gets lost.