Lots of players are surprise to see this thing on their game..
The price for Golden Treasure Chest and also Treasure Chest is cheaper to only cost you 2 Reward Points!
Also have other screenshot from another mafia to proof this..
Well, one of my friend has clicked on the BUY button but it costs him 9 Reward Points!
So it's only an annoying bug... just skip this whenever you see that fake offer..