These in-game events are a load of crap, I've never personally known a game to have so much out of sub costs for things. Its irrelevant whether or not there optional. They shouldn't be optional pending additional financial resources. They seem to getting more and more obscure, its like there answer to 'no more mog station'. Just make these things quests, even put a time limit on the quest if you have to, surely that would be better if serving the player base was paramount...