This religion will not die in 10 years. Yes by definition it is a cult, but it's not a small group ran by one charismatic leader. The internet has been accessible to the masses for twenty years now, and the religion still has millions of very loyal followers. Growth may become stagnant but that doesn't mean the religion will die. It is not your typical business model.
Look at Sears/Kmart, they are a company that should of folded years ago, but they are still around because they have assets they can sell, namely real estate. The same is with the JW with the huge exception of NO FEDERAL/STATE TAXES. They get a tax free income stream and free labor. This religion will be around for a long long time.