I'm assuming we have no idea if the "not sold out" is just a few rooms, lots of rooms, or most of the rooms.
I'm also assuming we have no idea what the minimum occupancy percent is to "break even" or "get the minimum profit desired" out of a cruise.
While I would love a discounted price, somehow I have a feeling that "not sold out" isn't going to be a good measure of how close to that minimum desired profit cruises are running at.
We'll know that it's increased from just a few rooms to closer to that level as the advertising ramps up (or not).