I have no insider knowlwdge...however my thought process would be not to release discounts until after the 180 day mark....then they would be able to see how many rooms they have sold just based on the numbr of guests who plan ahead and know the drill, then they could taylor the promotion to the number of rooms they feel they need to sell. If booking is really low Free Dining could be offered, if the numbers are solid, no discount or a room only may make more sense.
Now I would love free dining to be offered for my trip but do not expect it befor my ADR day...
Remembr you can book and call back to apply a discount later.