Putting Hiruzen New Year or Tobirama New Year is not cheap at all. Considering that a sealing scroll in the store costs 125 coupons and to complete the event you need 500 scrolls, the total cost is 62,500 coupons. Of course, scrolls can be obtained in free events, but it still takes a long time to gather them, and theoretically converting the items spent into scrolls is a way to obtain the total cost spent. So please, do not say that the ninjas are expensive for this event, few people would be able to complete it, and the ninja would not be given away for free.