When you land on graphicore.github.io, you're met with a 404 page that says "There isn't a GitHub Pages site here." That's a clear signal that this subdomain isn't hosting a live website right now — it may have been taken down, never set up, or deleted. For anyone wondering whether to trust it, the short answer is that there's nothing to evaluate.
GitHub Pages subdomains are often used for personal blogs, portfolios, or project documentation. A legitimate project will have some content, a readme, or at least a landing page. An empty 404 doesn't necessarily mean the site was malicious — it could just be abandoned — but it does mean you shouldn't expect any service, product, or information from it.
The technical signals like a valid SSL certificate and Fastly CDN are fine, but they point to GitHub's infrastructure, not to the site owner. Without any web archive history, social proof, or even a basic homepage, there's no way to verify who ran this site or what it was for. If you came here expecting a working website, you'll be disappointed. Treat it as a dormant URL until evidence suggests otherwise.