I'm sick of their assumption that everyone in fandom is either extremely innocent (and thus unable to recognise a money-making opportunity for same) or just plain dumb (and thus unable to recognise a money-making opportunity at all). I'm also sick of the assumption that we're all fluffy-minded teenagers with no life experience, no business experience, and no actual knowledge of anything outside our own heads.
As I believe I've mentioned before, it's worth noting that when it comes to fandom, we're an extremely diverse group, and if you pick a profession there's likely to be at least one representative (if not more) of that profession in any given group of fans. Sure, certain fandoms may have a larger clump of certain professions (for example, LOTR fandom does tend to be high in geeks and computing types, but that's mainly because there's a pretty high overlap between geekdom and SFF fandom in general) but even so, a person's professional life is no predictor of their home life in anything other than the most general terms.
From all the information we have about this particular "entrepreneur", it appears he is young, extremely privileged (white, male, upper-middle class, educated, USAlien, apparently able-bodied, probably Christian) and therefore extremely ignorant of anything outside the boundaries of his own damn skull. To start with, he appears to believe nobody in the fandom has even the basics of search skills (and thus the rather more candid comments he made over on his blog wouldn't be discovered by the users of the fan-site he's just purchased).
He hoodwinked one rather naive fan-site owner. He's now dealing with the rest of the fan-site users, who appear to be a damn sight less naive and trusting.