The responses make sense to me... The majority are "middle class". Just my opinion but the "rich" how ever you define that (500+ a year? Millionare whatever) Have no need to own DVC if they want a multi-room stay at WDW they will simply pay 15-20 grand cash for a normal stay without the hassle of ownership AND want the services DVC doesnt offer ( daily housekeeping, other services)
I think the majority owners are 1. Disney fans 2. who forsee multiple trips in their lifetime 3. and did the math where DVC makes financially sense.
Demongraphic most likely: Your typical middle class family who vacation 1 or 2 a year and where Florida from cost sides is affordable compared to say yearly trips for a family of 4 to europe etc..., travel to WDW twice a year.
The above is not the "rich" crowd, but doing ok, well crowd who prioritze WDW over maybe other things.