http://archiveibwfnjismruw7g2pngpz3kuyod3wnun2sh7x3z35ticvpp2yd.onion/faq
Because it is not a free-walking crawler, it saves only one page acting as a direct agent of the human user.
Such services don't obey robots.txt (e.g. Google Feedfetcher , screenshot- or pdf-making services, isup.me, …) Is IPv6 supported ?