More than likley these guys are an expense to russia to keep. They have been tortured at length in various ways. Debriefed, "reeducated", and when russia is satisfied they can get all they can, what are they supposed to do with them? The red cross registered as many as they could. They are no longer a threat to russia in this state. They will survive and get stronger tho, and the ones that can, will feel compelled to return the favor.