cant speak to this specific waiver, but typically eligibility requires the flights to be purchased by a specific date - typically prior to the time the waiver was issued. So technically, by the rules if it’s the same case, then no, that wouldn’t be allowed - and it’s usually set up that way so you can’t do stuff like you are proposing. That said, computers may not be programmed with the specific purchase by logic included, so it might work. Tell us if you try, but I’d assume it wouldn’t.