The ones who survive are the ones who do not question the LDS Church either in its doctrine or its own whitewashed history.
I don't think the LDS church is aggressive in excommunicating apostates. You basically have to demand to be excommunicated or somehow become a public embarrassment to the LDS Church before you are removed from their rolls. I haven't been a Mormon in nearly 40 years, but as far as I know I'm still counted on their rolls as a member because I never formally requested removal.
The disingenuousness of the Mormons lies in their refusal to acknowledge the teachings of their past apostles and prophets and their insistence that what is clearly Mormon Doctrine is either not Mormon doctrine or is somehow misunderstood by those who call them on it. It is endemic throughout these threads. Mormon doctrine is exposed and Mormons deny that it is Mormon Doctrine. They claim that their apostles and prophets were either misquoted or misunderstood.
But the truth is that they were neither misquoted nor misunderstood. What they said was and is embarrassing to the LDS Church and its members and rather than face up to the truth, they accuse those who point it out as being liars or just Anti-Mormons.
I don't envy those who attempt to defend the LDS Church on these open forums. The most common tactic they seem to employ when faced with facts is to attack the messenger. Cest la vie.
Ya think???