Add Waitlist Sign Ups to Affiliate Link Program

I just set up our next Wyrd Writing Camp as a waitlist for April! Thank you for that! However, when I went to go and add that group to the affiliate program that exists for our Wyrd writing Camp - It did not give me an option to add the April Co-hort. Can you allow that capability - I want people to be able to invite their networks and still get a kick back if they want.