1. It is always possible, I think you know well that there is no perfect protection. We just need a collaborative community to find vulnirabilitys.
2. May be he shared with someones (or not !), but for me : " I'm sorry, I can't share the method. If you want some Credits for free give me your facebook login and I'll give you 3M Credits + Some x10 Blue Containers opened. "
I told him that I cant connect to FB from the game, I have a bug on my emulator on PC, but he didnt reply.