Update: I talked with the guys in Faircoin support team, they tried to fix the issue by sending them to an old wallet. But it didn't worked. Now my only hope is the poloniex. Their support team haven't responded yet. If they update the Faircoin wallet everything will be fine. Meantime I will try to convince them to reactivate Faircoin in market pool. You could also make personel request via this link https://poloniex.com/coinRequest thanks for your interest
There is this comparison with proof of work: https://fair-coin.org/de/node/152
Mainly: proof of work creates inequalities and affects the environment.
proof of stake, still creates inequalities
proof of cooperation solve both of them.