Along with "Clam's" insightful comment, we have to take into consideration ALL the changes in doctrine and behavior that has been seen since the 1950's!
Up until the 70's, we saw a "kinder and gentler" WTS with not nearly as many demands and orders made for the JWs to follow like mindless robots. There WAS an influx in membership, and the promise of a "Paradise Earth" in a few months....was a strong drawing card. It was in the mid 1970's as I recall, when the stringent "rulez and regz" began to emerge, right down to this day...
...when JWs are told that they cannot leave the arena where a convention is being held to go out to get lunch, how many guests they can invite to a get-together in their own home, that an ELDER should be invited to keep everything going ON there on the "up and up", and the hateful way that JWs are to treat any of those that leave the WTS....."just for starters".
The WTS is shooting itself in the foot by issuing all these "rulez from God"...especially in this time period when personal freedoms are becoming more and more prominent and people are becoming more and more tolerant of the differences IN others.
The WTS "invitation" is more like the biblical "sackcloth and ashes" and their "worship" at the "meetings" is now 50% learning WTS sales pitches and how to gain converts for them....and NOT praising their Lord and Savior, Jesus Christ----or in teaching that THEIR humble JW knees should be bent in love and appreciation in HIS name and that HE died for ALL mankind. The WTS does a good job in overlooking this.
Most folks are turned off at all the WTS preaches and teaches....as well it should be.
Annie