It's taken me about 7 years after leaving the Watchtower, to become actively involved within the exJW communities. As part of this I created a couple of videos to, hopefully, help some others. But what amazed me was the number of people who have PM'd me via YouTube who are still active members of The Watchtower - who know it's not The Truth - but haven't left. This is not a critism as I know that are lots of reasons why people don't or feel they can't leave.
Now I am wondering what the estimates would be as to how many inside the congregations are non-believers, and how many of those non-believers are actively working as a group to expose the Watchtower...? Would anyone have a handle on the guesstimates - is it in the thousands ?