I seem to recollect seeing on one of slim's collapse threads some demographic data showing jw members by age range. With so few JW's coming in from the preaching work in the West, i find the demographics more convincing when it comes to organisational decline. I recall there was a bubble there which indicated a pretty sharp average age jump at some point, past child bearing age & with less & less young child bearing families there is less kids born. This is a more realistic perspective on the manner in which religions wither away.
I think the JW's will re-organise as they have been doing to make their money stretch. They won't just fold up. But the cut backs will no doubt have a psychological effect on members because these sense the expansion is over & the glory days are behind them. This is surely taking place already & it leads to apathy which makes people leave at a faster rate.
Many adherants will never leave no matter what & so it will just be a matter of waiting for them to die - watching that demographic bubble slowly move down to the end and drop away.