Curiously, the author "Jay Riverlong" doesn't appear to exist prior to a month ago, right around the time when GPT-3 came out. For a "professional poker player" who "travelled extensively throughout South America and Europe", it is interesting. Could be a pseudonym, but it's hard to tell whether the author is a real person.
https://news.ycombinator.com/threads?id=riverlong
https://github.com/jayriverlong
https://twitter.com/jayriverlong
https://jayriverlong.github.io/about/
edit: I have pinged him on Twitter. Let's see what happens. https://twitter.com/breandan/status/1287148374077186059