Due to the effects of Moore's Law and broader social evolutionary factors, all religion is in decline.
Ideology by its very nature is not based on fact and reason. When an ideology is challenged by facts that demonstrate its dogma to be false, ideologues typically dig their heels in deeper. GB are ideologues. They are responding to the onslaught of information that exposes their ideology as false with tighter controls, emotional manipulation, and a dumbing down of information presented. All of these things work against them, and actually exacerbate the problem in the long-run.
JW are not alone in this respect. We see the same thing happening to all ideological groups that doggedly refuse to accept facts and the effects of social evolution. The Republican party, all other authoritarian religious systems, etc., all are experiencing the same pressure to conform to accepted facts and social change, and all of them are trying their best to not cooperate. The response is one of ignorant refusal. The good news is, facts catch up sooner or later, and will force change whether these groups accept it or not. They can either evolve or die out. The same will be true of the WT.
For those of you that think the WT will be around forever, keep in mind that social evolution follows a pattern very similar to biological evolution, just with a much shorter timescale. Small incremental changes in society eventually result in a larger paradigm shifts, (think of the state of the GOP before it indirectly produced a Donald Trump). The societal changes affecting WT, along with their own stubborn refusal to accept facts, will eventually produce a situation they cannot control, and that will force their demise, or at least force them to take on a likeness that no one would recognize as JW.