He gets emails from any source he can get. He also does not believe in the "opt-in" system. He has gotten stuff from whatever the equivalent of the "better business bureau" is that handles stuff like that. He just blows it off. He firmly believes that people truly do WANT to receive his emails. "They're wrestling people! It's wrestling information! Why wouldn't they want to receive it?"
Penn State students are hired whose job it is all day to sit at a computer and "harvest" email addresses from websites, bulk emails, etc.