From my experience, after 2nd patch 1.5.5, I can still use dupe items. However the game does not save no matter how long I play afterwards. I keep on checking if it is connected to my google account and it is since the option displays "disconnect" instead of "connect". After closing the game my save game reverts back to before I activate the dupe item with GG. It has been like that since yesterday. I tried it like 4 times already. I wonder what to do regarding this problem. Feed back would be appreciated. And can anyone teach me how to do the inbox hack if it still works. I got 0 coins.