There's obviously demand for the puppies, so why don't the scammers set up a legitimate breeding business and just sell real dogs? They'd make money, the customers would get real puppies, and the dogs would go to good homes. Everyone wins, and it would all be legal. Why commit a crime to make money, when you can just make money the old-fashioned way, by working and earning it? Setting up fake ads still takes work, so why not put that effort into an actual breeding business? It makes no sense.