First you run the risk of having your account flagged. I'm sure what you are attempting, they had thought about. Otherwise, they wouldn't give the advance notice. I read they set a limit on how many of those they will allow.

Second I hope their IT has improved. Since they can change the "price" month by month, maybe the CSR can also adjust the "price" (say within the offpeak to peak range) on the fly on a particular booking. In that case, they can just adjust and issue you the award at the booked level, which means they don't need to give you any extra points.