I got and offer last year for some cruise but instead of being free it was $200 for an inside or outside cabin. Took them up on the offer and booked the Rotterdam Halloween cruise. Since I had credits given to me from HAL because of cancellations because of covid I actually got the cruise for free, they didn't even charge me any taxes of fees, free! About 10 days or so before the cruise receive an email for an upgrade for a balcony, $198 obstructed view or $398 unobstructed. Called right away and moved up to balcony obstructed view better location then unobstructed. Once on the cruise Hurricane Nicole comes around, couldn't dock in Fort Lauderdale the day of return so a 10 night cruise turned into an 11 night cruise. Thankful I live in Florida and can drive to the cruise port. Turned out to be a really nice cruise and the Rotterdam is a beautiful ship!