F. Commercial Use Prohibited. Use of the Network and/or RCI Points is for the personal use of Members and, if permitted, their guests, and neither Members nor guests may use the Network or RCI Points for commercial purposes or monetary or other consideration, including, without limitation, auction, barter, rental, raffle or sale of RCI Points, Confirmed Exchanges or Guest Certificates for example, and RCI reserves the right to limit the number of Transactions by a Member.
So I would expect that an RCI equivalent of David's would get shut down right quick. It's not just the DVC definition of "commercial," but it's "commercial purposes OR monetary or other consideration."
I'm uncertain what you want to accomplish. It's against RCI's (and II's) rules to rent any exchange. Approaching this from the standpoint of non DVC RCI points membership, RCI will semi officially allow one to recoup direct costs like exchange and Guest Certificate fees but not maint fees, II won't even allow that. But RCI is an exchange company and points there are based on an underlying ownership. One may be able to rent out the home system or resort in lieu of RCI getting the exchange and giving RCI points. If it's DVC points that have gone to RCI, one is mostly out of luck unless they can use them themselves or give them to someone else. If you want to secure other timeshares by rental, there are quite a number of options there.