Unfortunately, where I live, the congregations are stable in size. The same congregations that were there when I was in are still all in place, and they seem to have bounced back from their slump.
I guess it's the fact that most of the publishers are poor, and are totally dedicated to the cult. They will do whatever it takes to scam people into it, and even push interested ones off the Internet, make them get rid of their music, and hound them to study and then go to the boasting sessions within a month of starting the study under threat that Jehovah is about to kill them if they don't. Then, once they are in, they are locked in because one of the things that is required is that they give all their money to the Worldwide Pedophile Defense Fund and not get a decent job that will let them live without the tower.