He's giving it away, no money changing hands.
> or otherwise transfer Promotional credit
Is what he has "promotional" credit? He says he has credit... is there a difference? If there is, then that quote doesn't apply. If they are the same thing, and it's used on his account?
If there is no "sale" or "transfer", then yes... it is clear: He's fine to use it as he wishes.
This is very very likely promotional credit. They hand it out like candy.
Edit: Okay, I can see that if his approach is to use it on his own account, but for someone else's purposes, then it's probably fine. I don't think they even have any system to transfer AWS credits
Edit2: Then again I would be wary of publicly announcing that I'm actively trying to use my AWS credits for other people even though I'm not technically "transferring" them...