Without JavaScript, all I get is a background image and a top "navigation bar" where the only thing that's actually operable at all is a signup link. Which then goes to a completely blank page.

I still don't know what Posthog is, but I'm now committed to never using it if I can at all help it.

We are taking about a company’s JavaScript libraries (the npm attack). Knowing that, I’m pretty sure that people who browse without JavaScript enabled aren’t their target market.

I’m apparently also not in their market so, the best I ca say from the website is (hand wavy) “website analytics”.