If it is all a Satanic conspiracy, why haven't they taken out the Flat Earthers?

[oursin]

Okay, I'm probably being naive in expecting any kind of logic from people who hold Flat Earth conferences and believe that there is this massive Evil Conspiracy to delude people into thinking the world is round and in space, etc etc -

But perhaps I've read too much of the wrong sort of literature, but you'd think that if this was such a major challenge to an evil conspiracy by Satanists and so forth, they would not be thriving as they apparently are and meeting in the open. But would suddenly, silently, vanish away as if they had met the boojum - whereas as far as one can see, all they encounter is snark - that-is-not-a-boojum - in large amounts.

I can see that it sort-of sits comfortably alongside various other kinds of conspiracy theories, but does it necessarily have to fit with religious creationism? (probably?)

Is there any large significance to the revival of flat earth theories? or are they always muttering away somewhere and occasionally being noticed?