How you can make difference between, for example, 1st Place Treasure Sack from Bunny Money event and 1st Place Treasure Sack from Treasure Hunt Event? Yes, they still exist in game.
Try opening it and you will see that sacks from bunny event will give you old rewards. Believe me I've tried :P
Ya, no problem with that.
But what about some scamers, who sell, for example, 1st Place Treasure Sack from Bunny Money event as 1st Place Treasure Sack from Treasure Hunt Event? How usual players can differ them? Same name, same image! Different ID, but I think only GM can see Item ID.