What is Ahrefs' business? Sure "SEO", but what does that mean, exactly?<p>They seem to have a poorly coded web crawler. I wrote an "infinite web site" PHP program that Ahrefs reacted to very poorly: <a href="https://github.com/bediger4000/infinite-fake-website" rel="nofollow">https://github.com/bediger4000/infinite-fake-website</a><p>Since SEO is a major contributor to lousy search results, I'm now just trying to ban them all via robots.txt, but it doesn't seem mean enough.