Talked to a guide about this last week. From what she said, it sounds like there are some updates coming on the horizon where the Membership Extras may change to saying something along the lines of "Membership Extras are available to those members that have purchased at least XXX number of points directly from DVD". She said the numbers being discussed hover in the 160 points range, and "grandfathered" points will not count towards it. It will be simply did you purchase at least XX amount from DVD or not regardless of the date you purchased them. Now, that may just be salesmanship, but I have not known Disney guides to be untruthful like other timeshare sales people. I purchased 50 points direct to go along with the resale I have in motion...but I cant imagine buying another 110 direct for the extras.
I also cant imagine Disney actually wanting to lower the resale value of contracts (and cut off the fountain of direct small-contract sales) that would result from such a policy. But, she said it was coming, just a matter of time.