Yeah, my experience is also that they're mostly proxies and iframes are a minority. Some serve a cached version of the site (since like most of these, my sites

Yeah, my experience is also that they're mostly proxies and iframes are a minority. Some serve a cached version of the site (since like most of these, my sites are static - they do update to get the updated answer lists though, since I manually set the puzzles a bit in advance.) Some of the sites that host their own cached copy even go out of the way to remove the credits and contact info from the page.