It could be suggested that they may of done comparatively well.
For the amount of literature and field work JWs do to lure in new members, you must be joking.
Lies and corruption have done well for the WTS particularly 1914, 1975 but there was a eventful drop off after 1975.
Can you name a religion that has a documented slow growth rate but proselytizes as much as the JWS do ?
Wake up and smell the coffee Joe