According to wikipedia: An ancient Japanese legend promises that anyone who folds a thousand origami cranes will be granted a wish by a crane, such as long life or recovery from illness or injury. The crane in Japan is one of the mystical or holy creatures (others include the dragon and the tortoise), and is said to live for a thousand years.

My idea is to allow each person who purchases the poster to use it in their own origami crane, the cumulative of the cranes created from the  posters equaling or excelling 1000.