Credit No Matter What

After great conversation with a new user I decided that you should receive credit for shipping a book regardless of another user marking it as delivered. Of course this immediately raises the concern of people abusing the system, but I'm not worried. If people don't receive a book they can still report the abuse and if I see a lot of non-delivered books from the same user then I can address the problem. You will notice that shipped books now contribute to your community investment value!