Many of the comments here are interesting and certainly valid. One thing that is lacking here, however, is the mention/understanding of Moore's Law, as concerns the Internet/technology. The advancement of technology certainly has contributed to large numbers of people leaving and waking up. In the developed countries, there is a decline which is steadily increasing.
However, technology does not advance sequentially. Technology advances exponentially.We tend to calculate and analyze future probabilities for the Watchtower, based on our past experience of change within institutions in general. This is a mistake, as change is happening exponentially, not sequentially.
With increasing exponential Internet/technology advancements, there come increasingly more new ways of change that none of us could have imagined. Who would have thought that social media, forums and the Internet would be so crucial in connecting us together back in the 60's, 70's, 80's and even 90's?
The cult organization may not change, however, the world around it is, and at an exponential rate. Generation gaps used to be 20 years. Now they're 5 years or so.
My guess is that the cult will still exist as a corporation, however, if it will have any viability or life left is another story.
If the Watchtower Org handles its accounting the same way it handles its child abuse scandals, then it certainly won't look good for them. My 2 cents.