yeah I'm always switching between grinding for coins, those things to level up with, and also affection items but maybe I should put a pause on that one while the event is ongoing
if it is expensive right now, I feel that's not surprising because it's kind of indie - it can't be on any of the app stores, and, iirc, the reaction didn't seem large prior to launch, so they probably felt they had to compensate
Make Edmond your favorite during the event period and you'll be able to hear his exclusive birthday voice message in the main menu!