Sorry, but he writes like an 8th grader. 99% of the sentences in this article could be popped into /r/iamverysmart.
Why would a group of 5 random billionaire preppers "trick" him into coming to talk about their elaborate doomsday compounds. They gain absolutely nothing by talking to this guy.
And why are they asking this random author "Should my compound have its own air supply?"
Sorry but I genuinely think this author just made this whole thing up, or is severely exaggerating what actually happened.
Do billionaires have preparation for global economic collapse or planetwide warfare, up to and including a security compound for them to flee to? Definitely.
Would they talk about it with this pseudointellectual, for absolutely no reason at all.. to ask him questions about their builds, or whether or not they should have their security guards wear collars? Absolutely not.