The magic question, starting at 1,200 pts on a single cruise gets you an offer. 2,500 pts combined in a year 1 Apr to 1 Apr gets you a free 7 day interior.
The secret is to keep using your original money by winning and putting it back through the slot machine over and over.
You get 1 point for every $5 put into the machine.
When you start earning more points, you start getting other random offers.