We have certain programs where people can sign up for multiple weeks of a program. They can come back and enroll in more weeks of the program later if they would like to add weeks at a later date, and we have spots available. The current returners discount allows people to get a discount if they register for the program, decide they want to add weeks 15 minutes later, and log back in to enroll. If we could get some sort of functionality that would allow admins to choose if they want to allow that or limit returner discounts to only people who have enrolled in other enrollment periods, that would be ideal.