I note you didn't mention the group who asked you to work for free, which is (a) too bad, because I'm curious, but (2) very smart, because smoke from burning bridges seldom helps future environments.

Well done, Emily! Not just for you, but freelancers in general. Hopefully this will help reduce the opinion of, "Hey, they'll work for free, they need the publicity, right?" Or whatever self-serving justification they tell themselves.