just coz there is fuku don't mean you need to spend, but it does gives more options, think of it as optional packs XD

more fuku will also force borderline players to choose which fuku to go into or not.

however, "those on the maxing borderline" don't like to have more fuku than they can afford since it means >

too much fuku = bigger whales will do all, thus grow faster and the borderline be losing out.