I don’t think the cult will fail just adapt as it has done in the past. I was listening to an interview with a former westboro Baptist Church member. Even in more extreme cults like this members just stay in despite all the pressure and this cult gets way more pressure then the JWs. These cult members are not nearly as isolated as JWs are because they want to see and hear what everyone else is saying so they can respond. Yet even with all this exposure to the out side world they still stay.
The members that do leave are said to be evil or mislead by Satan loosing all credibility with the other members. So if an extreme cult allowed to be exposed to way more info the the JWs is still surviving then the JWs will survive to.
The only good thing to take out of this is in extreme cults it usually just the kids that are raised in it stay members.