Quote Wki
Thousands of members left congregations of Bible Students associated
with the Watch Tower Society during the 1920s, prompted in part by
Rutherford's failed predictions for the year 1925, increasing
disillusionment with his on-going doctrinal and organizational changes,
and his campaign for centralized control of the movement.[2]
William Schnell, author and former Jehovah's Witness, claims that three
quarters of the original Bible Students who had been associating with
the Watch Tower Society in 1919 had left by 1931.
https://en.wikipedia.org/wiki/Bible_Student_movement
Jehovah's Witnesses are like Cockroaches, you can get rid of hundreds of thousands of them, but eventually they come back and start growing again.
Right now with all the Changes in the religion, many are leaving, .....But give it a few decades, and the religion morphs into something else, just like it morphed from Charles Russell to Rutherford ideology, and just like Cockroaches, it will start growing again.
That's just part of human nature, there will always be the gullible and the ignorant that are attracted to the cheese. And every year, millions of humans are born into a very complex, and crazy world with millions of scammers waiting for prey.