He's true math nerd, and definitely not a marketer. In fact, I don't think a single marketer works at the company. It's a bootstrapped labor of love and I've been following their journey for almost a decade.
I get the skepticism, but some things are legit.
Your whole blog post comes across as an advert, that may not have been your intention but that's what it looks like to me, legit or not.
Especially ridiculing a tech person giving detailed and interesting answers as a "marketeer".