I saw the offer by coincidence this morning, it must've been minutes after it had been released and availability in late September, late November, and the second week of December was abismal to say the least. I wasn't looking to book, just looking out of curiosity. The cheapest room I could pull up with FD was a club level suite in Coronado tower. So maybe it's just an play to fill premium rooms/resorts.
The room discount has much better availability, although the supposedly discounted rate at the values in September was equal to rack rate. Maybe it was a glitch, maybe it wasn't.