as far as i know (i'm not adm) but i have no intention of launching, because the cod that has no customer is cod4 (MW 2007) but I don't know if there is a way to do it, (bo1 already has a customer that is empty, some people ask for a plutonium to see if it gets fuller, but they have no intention of launching because they already have the client rtk5)
PS: sorry for my bad english