Here's a link to an interesting article on the apparent demise of cults. I can remember being accosted by various culty groups back in the '70s, while walking through the airport in LAX.
This article ties the dwindling number of cults in western culture, to a shift towards secularism. I wonder if the JWs are a part of this trend, yet perhaps slower to die out due to sheer numbers.
As mentioned extensively in other threads, the bad press against JWs, along with leaks, and everything else available on the internet would certainly accelerate their downfall. I believe that the smaller cults which have all come and gone are tantamount to the 'canary in the coal mine,' and are indicative of what's in store for the Watchtower.
Here's the link: