While trying to answer a question on the web application security forums, I was going back to find a possibly archived link on the Internet Archiver. While playing around with Internet Archiver I noticed they had a pretty boring XSS exploit in them:
One of the ways SEOs make money is to buy recently expired domains. Then they go to the internet archiver and input that domain. They crawl the entire internet archiver for all the content on the site, and then restore it back to it’s original glory. The external links are still valid, and the pagerank slowly goes back to the way it was before the site changed ownership. Once the pagerank is good and high they can switch it to whatever they want and monetize it as they wish. The original owner is powerless at this point.