You should be careful the account is not hacked or else the owner may get it banned/claim it later. signing a message by an old BTC address in a previous post can confirm this is the real owner I think.
They might be able to get it banned later, but my understanding is there's no way to reclaim an account once it's been sold and the information is changed.
There is a way to get it back supposedly by contacting the admin "Theymos" and signing a message from an address posted in an old topic/private message, That wasn't working recently though.
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add the legendary sunken continent as well 
