Indulge me one last time and I promise I will stop.
I just want to know how this stuff works. Not that I would consider renting out DVC points anytime soon since for the last 15-years I've always never seem to have enough.
I think I see the rub here.
The owner is renting the DVC points to a second party and sets up a reservation for the renter to stay at the renter's second choice resort which has inventory for the nights desired.
The owner gets the money and does just one last thing before riding off into the sunset with cash in hand - transaction complete.
The one aforementioned last thing would be for the owner to make an active request to the wait list so that the renter can possibly get the first choice resort if something opens up. Otherwise, the renter simply stays, as planned, at the second choice resort.
From the owner's perspective everything is no big deal unless (big unless) the DVC points required for the first choice resort is greater than the DVC points required for the second choice resort.
In which case the owner would suddenly be on the hook for more points.