I wonder if they will be offering additional incentives to direct Riviera purchasers...I can think of a few ideas that could potentially swing people towards buying there, especially if they are swayed by emotion vs. finances.
I can't comment on what will make other people interested in buying in. Personally, free APs for life for me and all of my family and friends, plus an extra 3 fastpasses a day would be enough to get even me to buy a few more points direct. Short of that, and I would have to look at resale value before making such a big purchase. I don't buy cars just because they look nice. That may be part of the equation, but how much they retain their value is another part. I took into account the value of BLT resale when I bought in, and if that value was very minimal, it would probably have scared me away.
If this is really happening, Disney had to account for potential buyers such as myself and had to either have come up with a fallback for them like "If you decide to sell, we will buy it back at 85% of your buy-in cost", or something along those lines, or they figured out that most of their direct sales are emotional purchases anyway and are more in the mindset to sucker people into committing tens of thousands of dollars than to actually build lifetime customers.