If a grifter can get his weak-willed marks to buy into the intangible idea of an invisible conspiracy (or an all-powerful invisible entity, for that matter) then selling them actual products is even easier. Glen Beck, for example, would whip up his audience up about the coming apocalypse and then cut to a commercial for a numismatic gold outfit (which he happened to own a healthy chunk of).
Now we can just call his followers “Smurfs”: