I just submitted one last week. It was honoured. It took about two days for them to get back to me. They gave me $160 of on board credit. They give you 110% of the difference in credit you can use once you are the ship. The credit won’t show for me until I am in the ship it said but can be used for booking excursions, gifts, etc.. anything onboard. I wasn’t on a wait list though so not sure if that changes anything, it’s worth a try,