My suggestion is to keep checking if you're looking to buy one. It showed as sold out on the day they changed it from "pre-order" to "add to cart." I assumed that I had missed out or that they had done it on purpose to keep people from using the discount like you said. I happened to check again a few days later, hoping that there had been some order cancellations or they had received another shipment, and it was back in stock. If you are able to order, just make sure to contact the Support department since the discount wasn't automatic. They said to let the order charge in full, then to contact them again after the order shipped to have them issue the refund. It took some work, but it was worth it for the discount.
I'll keep my eyes peeled, but i am sure no-one knows how many they will get back in.