JWs do also have a very high churn rate compared to other denominations
Where’s your evidence for that?
You complain about my response, but what you said specifically was:
Additionally, we all know that direct comparisons with other churches are invalid where there is no (or trivial) social impediment to leaving the church.
I’m just trying to work out why you think this is a reason to discount JW growth compared with other groups. JW growth obviously is related to something(s) they do differently from other groups. You think you’ve identified shunning as the key difference is. Even if you’re right that is the key difference (no doubt it is a factor) why would that make comparison invalid? It’s basically saying you can’t compare two things if there is a good reason for a difference between the two things. But of course there’s a reason, that’s what produces different outcomes. It’s like saying one restaurant is more popular than another, and the other person responding that you can’t make that comparison because it’s cheaper than the other one. Well yeah, that might be one reason, but why does that mean you can’t compare?