Are not all resorts in your example not in RCI then though? The word on the street is that SSR once and a while and AKV rarely come up but that is pretty much it. Its not like you are in RCI and randomly choose to just book what you wish.
I don't believe I either gave or cited an 'example.' What I attempted was to
separate "listing in the RCI directory" from posting "available inventory." Presently, all the DVC locations shy of Copper Creek and Riviera are listed in RCI's Directory; RCI members outside of the DVC<>RCI relationship may open searches
requesting any of these resorts.
But having inventory is different. As you said, most of the DVC inventory in RCI in recent years has been SSR with a few sightings of AKL, OKW and AUL (very rare).
It won't be too far out before RIV shows up in the RCI Directory. And, yes, someday I expect to find inventory as well. But the inventory will not, under the current DVC<>RCI agreement, show up for other DVC members. It will, rather, appear to outsiders who have strong traders or those whose non-DVC timeshare have special, exclusive agreements such as currently enjoyed by Welk timeshare owners.
BUT the main point I was attempting to make: Yes, RIV will eventually show up in the RCI directory but
don't expect to exchange into it using resale-DVC. This route is, under present agreement, 100% blocked. However, sometime in the distant future when RIV inventory starts showing up ... you may hope to catch it using a strong non-DVC property.
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Just for background: I've owned non-DVC timeshare for 20 years and have completed many exchanges into DVC properties including BWV at least 6 times, Vero Beach, Saratoga, etc. I enjoyed two full week exchanges into SSR last summer (2019) against other, non-DVC, properties, each timed to overlap with different DVC Moonlight Magic events.