I read and lurked on these boards for about a year before I purchased. That was in the height of the SSR-basing, it seems. I rented at SSR before buying as well. However, I only rented there as it was the only place we could get a res at that time....I was planning on buying at BWV or BCV via resale.
Having read these boards, I was going to SSR thinking I would not like it. I went expecting to look for and notice all of the negatives I had read about. Then I got to SSR. Love at first sight!

The rest, as they say, is ancient history!
As others have said, I think the number of resales is due to a numbers game...or rather, several...
--the current promo right now is going to slow down resales, certainly.
--there are more owners at SSR, therefore more resales
--many SSR owners are new
DVC'ers, and new owners are more likely to finance (as opposed to many OKW owners who have been owners 10+ years and have long since paid off the intial buy-in). Owners who are financing are more likely to have to sell than those who own outright (due to not being able to make payments for any reason).
--I think that there are many "stripped" contracts out there from folks who bought with a discount, stripped the points, got a free AP, and then turned around and listed.
In any case....we love, love, love SSR! We have not stayed everywhere yet, though we certainly plan to. But if all we ever get is SSR, we'll still be in heaven!