I would say 80% of the born ins who i was friends with growing up are no longer witnesses. Rarely was someone converted. The few that i know of are no longer witnesses now. I seen first hand as many others have also, that the love bombing attracts a lot of people. Once they are baptized and the love bombing stops....they are gone. A lot of the converts also seem to have mental disabilities, are very poor, or have few friends and Jw's prey on these people.
I've seen others leave because no one invites them anywhere or to do anything. They'll associate at the hall with them, but thats about it. If you aren't part of the clique, then it sucks for them. Its a sad religion, and not one to go to if you want true friends.