And kobans must be the big WTF currency in this game for me.

Koban in this game used for meaningless things, like spend 300 to instantly clear mission!,... and 10 kobans... or worse, 1 magazine
Or refill stamina! only for it to deplete quicker than you masturbate...
Or collect all money! while you can just spend a minute at most to collect all...
gacha (or pachinko) is just as bad. Other games you spend 5 to draw one. In this game you spend 90... and it just darn rare outside event.
event is as boring, nothing much except you wait longer to get bits of kobans.