Pretty much all post 2010 weeks are external. When they first rolled out enrollment, they charged $1,495 to enroll a single external week and $1995 to enroll two or more. I doubt they will offer anything cheaper than that. I am sure many would enroll their resale weeks at those prices. They would have to look at the number of potential weeks that fall in to the category and determine what percentage they expect to enroll. Early on, enrollment was only about 35%. It is closer to 50% now. Would they make enough from 35% of those people enrolling to make up for their current losses? Probably not.
Also consider that they have their annual promotion going now. I wouldn't expect any enrollment option that doesn't require a big points purchase for at least another year.