I say we let the WT speak for itself, with regards to numbers:
*** w60 10/1 p.579 NumbersAreNotEnough***
NUMBERS are not a sound basis on which to build faith. If Christianity had been founded on numbers, it would have failed. At Christianity’s darkest hour, namely, when Jesus was on the torture stake, there was not one of his apostles that stood by him. Yet Christianity triumphed, not because of its numbers, rather because it is of God.
Large numbers tend to create a false sense of security.
*** w60 10/1 p.580 NumbersAreNotEnough***
Today, religious organizations have a habit of pointing to their great numbers and wealth as proof of their being favored by God.
*** w092/15pp.26-27par.10They“KeepFollowingtheLamb”***
Shortly before he ascended to heaven, the resurrected Jesus appeared to his faithful disciples and made a promise to them, saying: “Look! I am with you all the days until the conclusion of the system of things.” (Matt. 28:20) Has this promise proved reliable? In the last 15 years, the number of congregations of Jehovah’s Witnesses worldwide has grown from some 70,000 to over 100,000—an increase of over 40 percent. And what about the new disciples added? Nearly 4.5 million disciples were baptized in the last 15 years—an average of more than 800 a day. These spectacular increases are clear evidence that Christ is directing his anointed followers at their congregation meetings and is supporting them in their disciple-making work.***
That, indeed, says it all.
--sd-7