Given that you'll never be able to prevent copying, the question is, what can you do to minimize it? What can you do to make consumers happy enough with legitimate use of the system that they'll be willing to pay for it?
“I'm not going to give a courtesy gift to a person who's going to win, and I'm not going to give a sympathy gift to a person who's going to lose.”
“I don't want it to be all that self-conscious or artificial, but it really grows out of my having invented myself as a listener so that I could hear her voice.”