Perhaps if s/he were Serena Williams and wrote a book about the JWs and how awful and deceifful they were s/he'd have more credibility and a lot more people would read it and pay attention. And it actually might make money!
Since that isn't likely to happen, ex-JWs from out of nowhere will continue to write books no one will read about their unique experience (thinking it's unique, when it's really not, we've all been there, done that) and hope they have that best seller that will be made into a blockbuster movie.
I'm going to go out on a limb and say this isn't the one. Heck, no one cares about all the famous Scientologists coming out. Why care about some ex-JWs?