I apologize for accusing you of pasting AI output; I still would have preferred that you edited it down to a more manageable length.
The probability calculation apparently assumes that Ghislaine Maxwell has a Reddit account. Reddit had only about a million users in 2006. There were about a billion people with Internet access in 2006, so the chances of a given Internet user being on Reddit in 2006 are about 1 in 1000.
Regarding stylometry, I agree that the account reads as British (and the user admits that he's worked in the UK during an AMA) but it also reads to me as male, and not in a way that seems affected.
It seems to me that the whole argument basically hinges on /u/hasharin's screenshots being faked. I agree it wouldn't be hard to perfectly counterfeit Reddit screenshots, but it still seems more likely that they're real to me.
Overall I would give maybe 1 in 4 odds on it being true. Fortunately nothing of importance (to me) hinges on finding out the truth about this :)
> article speculates about Maxwell’s innocence
Where does it do that? I don't see it.