....unless those coins belongs to the attacker now and he's holding them somewhere, they disappeared from BTER but still are in the attacker's possesion, aren't they?
As lamiomni said, a profit happens when you double spend. In the current blockchain the deposit by the attacker would be invalid. So they are still with the attacker (unless they have been spent again).
Some of that TRC deposit may have been withdrawn by Bter users and should have vanished. Since nobody is reporting that it seems a tad fishy. Unless by luck all the withdrawls used other TRCs only.