As a note, I've just found out that I can simply adblock the Petrov Day overlay and frontpage functionality returns to normal.
i found out exactly three hours in, so most likely 2,100 but possibly 2,000.Edit: per habryka's comment, the relevant threshold was apparently zero.
The thing is, that's not a well-formed, non-fallacious argument. Your "evidence" in this scenario consists entirely of the fact that someone famous has also made the claim; that's the very definition of an argument from authority!
minor error - in the sentence "For self-published ebooks, it’s worse: the median number of sales is zero.", it should say modal (most common number) instead of median (number in the middle of the distribution).