Keep in mind that in 2010 DVD was actively marketing Bay Lake Tower (5.7 million points); the Kidani Village portion of AKV (5.6 million points), the Treehouse Villa portion of SSR (900,000 points), and the Villas at Grand Californian (1.9 million points). Also, in 2010 DVD marketed OKW as a low price alternative and sold about 100,000 points for that resort.
Not only did DVD have a huge amount of inventory, it was very aggressive in offering discounts and incentives to direct buyers. Cruises, Park tickets, sliding cash incentives, developer points were being offered at one time or another to entice buyers. Also, remember that DVD did not charge closing costs to members that added on points.
Once sales started in 2013 for the Villas at Grand Floridian, DVD stopped offering discounts or incentives for the WDW properties. Even the normal practice of offering a discount to Cast Members was discontinued. With the Polynesian Villas & Bungalows, DVD has continued this practice of not offering discounts (well, technically, there is a $5 per point discount on purchases of 2,000 points or more, but I'm not going to count it as a plausible discount for most buyers).
Since 2010, DVD has probably cut operating expenses in its sales division. It probably has a smaller sales force now than in 2010, and its closed the Doorway to Dreams sales offices in New York and Chicago. I imagine that DVD is quite happy selling fewer points at $168 than more points at a much lower price. Combined with the reduced overhead, DVD might be realizing as much profit today as it was in 2010.