Great point. I wonder, however, if ICHG has the capacity to ensure that members do not receive points for this promotion if registered for other promotions, namely those for which users must register by entering a promo code.

Note that members in other threads have been able to combine points by registering for more than one multiple night promo, though no doubt the T&Cs for those offers have the same restriction about combining with other promotions (and restrictions requiring the member to have been "targetted" for the promo in the first place).