Bottom line money not God. To grow a religion you need money and suckers who fall for your particular line of logic.
Take away it's money to take away it's power. The Ceos of the Watchtower Corporation are running the religion/business into the ground because they can't make good business decisions and are caught in a awful web of delusions of grander and blind to the realities of the real world.
The watchtower ship is sinking in it's own excrement.