As we have no easy way to check if a non-
DVC owner is trying to rent out an RCI reservation, and RCI weeks generally start on Fridays. Saturdays, and Sundays for 7 nights this solution was introduced. RCI reservations are not supposed to be rented. 7 Day existing reservations may be offered if they start on other days of the week, within the limits of the respective Rent/Trade board plans.
Another rule we are often questioned about is why not allow existing reservations until the 30 day window. This is to discourage members from booking prime weeks and resorts solely on the speculation of renting them out, preventing other members from booking their own vacations. This is why the relatively high plan prices for the Platinum and Premium plans and limited number of pre-existing reservations allowed. This was considered a big problem when the rules were initially drafted by regular posters on the DIS.