I'm stumped. Today I got presented a very interesting case of a website recuperating from a Google penalty within a matter of days. Here's what happened:
- The site got banned and was no longer ranking for anything. Not even its own domain name.
- Since the site is a rather large affiliate, a call was made and the webmaster exclaimed "don't worry, I'll be back in by the end of the week".
- Two days later and he's back to number one. However, he's not ranking his original URL (which is banned), but a proxied version using the d'accord proxy server on appspot.com!
Note that the original URL is still functioning perfectly, so no 301s redirecting link value or anything of the sorts. It's just the proxied URL ranking first on a fairly competitive finance term.
I've tried visiting the site with GoogleBot as user agent and I believe he's not cloaking any 301 redirects, although he may be cloaking on an IP-basis. Note that Google still has the full original site cached (cache is dated before the ban).