(1) Leaving the Witnesses is a process and not something that happens overnight. Even people who have stopped attending meetings or were disfellowshipped may still consider themselves a Jehovah's Witness.
(2) Some ex-JWs are so disgusted with them that they don't any reminder of that part of their past lives. I go through stages of this myself, which is why my participation here is sporadic.
(3) Ex-JWs like ourselves are independent souls. Following the crowd for so long makes me want to march to the beat of my own drum even more. I have watched a video or two of Kim and Mike. It's not my thing. Kudos to them for speaking out, but I'm not subscribed either. I am pretty picky about how I spend my time on the computer nowadays.
(4) Even if there were 1 million ex-Jws posting online, that is just a drop in the bucket. There are over 3 billion internet users in the world. Even if you were to break it down to only English speaking countries, that won't make much of a dent. Source: how many internet users are there in the world