This still does not explain why they simply did not remove itachi susano'o fragments from the event by continuing to show it for everyone else.

People like me or garv or opium did not care a bit about at most 35 fragments per event you could buy by paying 800 ingots per fragment (as if it was a low cost...), people like us cared about cashing 700 ingots to get 700 free coupons back without actually spend the ingots.

We do not care about shinobi feast itself, we care about an event that give us a 2x multiplier for LOW CASHING.

They removed all of them (shinobi feast, platinum recharge, the 100 ingots group purchase) to just give us events were the minimum to get something useful is 500 or 1000 ingots recharged that for us is an excessively high quantity for the poor rewards given or 1 roll for 100 ingots in a wheel that always give us coins, dangos and low level items.