This could potentially be a defensive move by Disney, not an aggressive one. They are opening up two new resorts in the coming years, and have to justify selling at higher and higher prices. At the same time, the existing contracts are moving closer to their expiration dates, and eventually prices will start dipping. It is possible that they fear people will be comparing $250 a point at the Reflections resort to $75 per point for BRV resale contracts 7 years from now. Considering that most people own
DVC for only 10 years or so, buying close to expiring points and then using them at new resorts would actually be a good plan under today's system. By restricting those resale buyers, Disney can make it easier to justify their high buy-in cost to get into the newest resorts.