Is it part of the joke that the site is intentionally over-pixelated while the author critiques readability? (edit: I don't mind esoteric design and I play old games. I found it funny to see a blog with aesthetics that are not optimized for long reading to complain about the readability of fonts)

I don't think any anti-AI font design is more than design-as-art statements against AI. If there is evidence of them being used exclusively for business and without accessible fonts aside them, I'm willing to be wrong.