The WTS knows how to increase the numbers across the board , they just simply lie and sensationalized doctrines.
If they see the numbers declining to a disturbing extent, you can best assume that there will be some more zealous lying in the future.
They don't give a whoot about who's life they fuck up along the way. They are to support themselves at all costs or regard for anyone else.
Thats a " Truth " you can depend on.
Coercive fear is their marketing strategy and they are true masters of it.