Is there a mechanism to identify users running masternodes? Can you follow the trail of coins and see how they left your cryptopia deposit address and went to another address that was used to set up a masternode? All you've got right now are just assumptions and accusations, without any proof. I don't like cryptopia myself, their current situation can only be explained as extreme incompetence or running a scam, but I still wouldn't accuse them of stealing coins for masternodes without having any proof.