Dead on the money Anon. It's not about SELLING books, it about being PAID for books whether they're actually sold or not sold. They'll also sell them to sponsors of speaking events - who will give them away to attendees - which is just another form of payola.
Sociopaths and psychopaths will laugh at inappropriate times because they haven't fitted that into their human-like behavioral repertoire. The interior is a vast reservoir of inhuman evil, the exterior is all an adopted act.