Another thought.
There is already less increase in advanced countries than there has been in the past. Is it possigle that Third World countries, where information is less available, are producing the real increase.
Mayabe those places will be targeted more heavily by the Watchtower in the future. I wonder if this is one of the reasons the Society became an NGO affiliate of the United Nations and still has some hidden NGO connections, to pave the way to gain entry into countries previously inaccessable.
Just an idea.