it was a package promotion offered in 2005 and 2006. In 2005, i think it became available for booking in June. In 2006, it became available for booking in April. In both cases, it was offered during hurricane season. I don't remember the exact dates, but Late August - early October. I think last year it was 8/13-9/29 or something like that. You had to purchase a package with the room portion at rack rate and a ticket for everyone on the reservation. It could be as little as a one day base ticket, but everyone on the reservation had to have the same package components. With the code, the dining plan was added on for free.
This year, it was offered first to UK residents who had to purchase length-of-stay tickets. From november something until 12/31, visitors staying on property had the opportunity to book a package for next August - September (i think 8/5-9/30?) with the
free dining program.
If it is offered to the general public again is anyone's guess.