I think member numbers does not really reflect the true amount of effort jws spend in "effective" preaching. One reason the WTS last September was pushing the "bible study" program. Or the quality of the members as to really reflecting their god's principles, including Jesus' human one. I gauge that I what I saw jw individuals actually said, in cases behind the closed doors. Do other religions do this, I wouldn't be surprised. The WTS has long said that numbers were not an indicator of a religion being the true one. They have changed their tune. (Of note, the WTS put forth a media link to this report. Something I haven't seen done except in recent years)
This was posted on Google News on 12-30-2024
https://www.jw.org/en/library/books/2024-Service-Year-Report-of-Jehovahs-Witnesses-Worldwide/