I assume it's still the standard MB program: half the first years points for $10/point. That's what it was last year when I added on on HH, and also when I added on at VWL in December. Only VB has a different MB program.
My info is a few months old and predates the WLV sales initiation but since no one has responded with much info, I'll add what i know (or knew). They have the standard $10 pp up to 200 points with a minimum of 100 points to qualify. They did have a special but I don't know if it's still going on or if it applies to WLV. If you were physically on property, you could get $10 pp on each and every point at ANY DVC property, I think the maximums and minimum points amounts did still apply.