I have a Future Cruise Credit from NCL almost four years ago (Haven and still haven't gone back) so it is expiring end of September and I am getting a call every week and the $250 I will lose out! Not really since I didn't use the OBC that came with the purchase.
I will see in the end of September if I will go back to cruising let alone NCL though we canceled and refunded our August Alaska for our 25th wedding anniversary. If I don't cruise with NCL, I will sell or gift the FCC and I've repeated that to them multiple times.
Princess is calling as well, that was my last cruise from 2019 as well as the one I had cancelled for Alaska.