It is better now. Each one is worth spending into if you want the items.

Spend 100 Ingots, get 435 coupons by 6 days.

500 Ingots gets you 100 coupons, 2.4 Seal scrolls (300 cp worth of items), 1.75 charms (200 coupons) and Im assuming that is a random stone pack like last time (cave key).

1000 Ingots gets you 200 coupons. 12 Common essence (1200 coupons). 3.6 Seal scrolls (400 coupons) and 2.4 charms (320 coupons)

5000 ingots gets you 12,300 coupons by 6 days.

(not to mention the 5,000 spending for Fukurokumaru's Deals) that gives you 37 cave keys, 5 Myoboku Grasps, 2 seal scrolls, and some sort of gift packs (probably magatama and charms))

All around, this event is pretty good.