I have always ignored the "discount" that those DVC fliers and signs tout, because they are based on rack rates. The analysis I did
was against the discounted room rate at the time we like to travel. To put it another way, how much do you have to spend
for the room you want (it could be a villa - they discount those many times) when you want it, and can you really get
that room?
For us, we love BLT and stayed there on a cash reservation, with something like 30% off, 3 days after it opened. Since then,
the discounts for BLT went down and down, and now, BLT has been excluded from every discount the past few years. So,
we ended up buying BLT resale (for slightly MORE than we could have bought direct for during that first stay, when they were
offering 10% off the $120/pt price - oh well

).
So, for those of you on the fence about a particular resort, try to book it with a discount, and see how easily you
can do so. If you have to pay rack rates, repeatedly, the payback time gets shorter.