SEGA Reported that some participants from the Thanksgiving 2014 that was held on August 16 shared their items codes throughout other players that ended up with malicious activities such as item duplications.
SEGA has taken action to all of the players who participated on such activities and so their accounts were suspended for a period of time. These players are now under supervision of SEGA and if any similar activities are seen from them that violates the Terms of Use Policy of SEGA will receive a permanent banned account.
http://pso2.jp/players/news/?id=4229
Connect With Us