The footprint caveat, stated plainly
We would rather tell you the trade-off than hide it. GitHub Pages has no server-side rules — there is no .htaccess — so the SEO-crawler blocking that hard-denies Ahrefs, Majestic and the rest at the server on our own fleet cannot work there. On GitHub Pages the best available control is robots.txt plus meta tags, which the aggressive backlink crawlers are known to ignore.
Every GitHub Pages site also shares GitHub's infrastructure and published IP ranges, which is a shared footprint in itself. For a money site or a mainstream project none of that matters, and GitHub Pages is a genuinely good, free static backend.
For the Footprint-Free line it matters, so we handle it honestly: GitHub Pages is offered but flagged footprint-weaker, the PBN default stays on our fleet or Cloudflare Pages, and the interface warns you when you choose GitHub Pages for a footprint-sensitive site. You decide with the facts in front of you.