I think that Galactic cup is a cool event, but I think we need more. My examples are:
-Double key event: one a month (or some time) for a whole day or some hours we can get double keys for completing a mission, but to be fair not from Key rush or selling food
-Damage multiplayer event: sometimes for some time one weapon or some weapons of one type gets damage increased
-Black Fiday: I think I don’t have to explain
-Halloween: Double food
-Christmas: Random chance to spawn extra food/key