I suspect there's also an overselling of a given property, and if not straight overselling, overselling the viable months.
Most vacation destinations are somewhat seasonal. Maybe the most major cities with year round cultural activities, but not in places like beach and ski towns.
You can potentially have 52 "1-week-a-year" people fighting over the 16-20 weeks a year the location is most desirable, and maybe settling for lesser times, or just not using it that year. Hell, why not sell 60 memberships, knowing some will just punt in any given year?
Most vacation destinations are somewhat seasonal. Maybe the most major cities with year round cultural activities, but not in places like beach and ski towns.
You can potentially have 52 "1-week-a-year" people fighting over the 16-20 weeks a year the location is most desirable, and maybe settling for lesser times, or just not using it that year. Hell, why not sell 60 memberships, knowing some will just punt in any given year?