Shots that illustrate RF topics, like closeup views of the camera insides, or the coffee shots, etc, are I think usually shot with whatever you have on hand to do that. 🙂
I have uploaded some SLR pics to the Northwest Scenery Gallery which invites all kinds of cameras, but was dismayed to find these appeared among all other uploads in the main Gallery view, and the random view too.
I think in general the intent is to encourage traditional pro and amateur RF cameras such as Contax, Super Ikonta, Canon, Leica, Voigtlander (old and new), etc. Even press cameras like Crown Graphic. I think also we wish to be inclusive rather than exclusive. So include as well as those that resemble RF cameras but happen not to have any actual rangefinder mechanism, relying on scale focus.
These can all be termed "direct view" cameras, as the viewfinder gives a direct view of the scene without intervention of a ground glass or LCD. And in a somewhat imprecise way, direct view cameras are sometimes called rangefinder cameras too, just to distinguish them from reflexes. Anyway, that's what I think RF Forum is about, but then I could be off base. 🙂