These incentives are only for VGC (add on prices only).
Here's a comparison on the rates:
The prewebcast for
September 2009 rates per
DVC News are:
Villas at Disney's Grand Californian Hotel****
$112 per point 25-49 points
$112 base price less $15.00 promotional discount; 50+ points
Special Offer 1: $500 Disney Visa Reward Dollars for purchase using Chase Disney Visa card; offer expires 9/15/09
Special Offer 2: Two free adult Annual Pass vouchers for every 160 points purchased; note discount drops from $15 to $10 per point with this offer
Then back in
August 2009 (this rate really tempted us) it was:
$112 for 25 - 49 pts.
$96 for 50 - 99 pts.
$90 for 100 - 124 pts.
$88 for 125 or more pts.
Wow, I guess the webcast offer for 250 points is pretty good, but the summer offer that ended September 1st was better. Nice perks (the penthouse stay) for the large add ons, but you can't say that really lowers your cost of purchase.

I just don't see that the webcast really gave any better deals, especially since in August you got a $24 discount for 125 or more.
Was there any discount offer for 50 - 99 pts. on the webcast?