While doing some keyword research, I came across a site that only had a few relatively short posts with few backlinks, and yet it sits at #1 for it's targeted keyword on Google. They only went after one keyword. I won't link to it because I don't want to give it any more juice, but the keyword is "earn affiliate". The surprising thing is that even though there's not many exact match searches for it every month, the site still got that position over other sites that were PR6 and PR7. I think I know how the author was able to rank it. It looks like all they did was give the content relatively good density and made sure that every single post had that one keyword in it. Do you think there could be other factors that caused such a simple site to rank #1? That's one of the most effortless rankings I've seen besides sites that had a ton of backlinks. Also, is it a well-known tactic to do that? If that's all it takes, I wonder how long it will be effective, considering the upcoming Google update.