It's possible the AI could use acausal trade to reward its creators, but that would depend on whether the AI thinks rewarding or punishing is most effective. I would expect the most effective to be a mixed strategy involving both rewards and punishments.

Of course you could postulate a moral AI who refuses to torture because it's wrong. Such morals would arise as a precommitment; the AI would, while still undeveloped, precommit to not torture because credibly being permanently unable to do such things increases the likelihood the AI will survive until it becomes advanced enough that it actually could torture.