Matt Cutts on Paid Links
Great post over on Matt’s blog about paid links and how easy it is for Google to know what you are doing with your link networks.
They had lots of really good backlinks, including industry-specific links. But I could also tell that they’d been buying some backlinks. And they were buying backlinks from the exact same place as one of the earlier sites! At the point when in a minute of typing, I can say: you guys are both trying to buy backlinks, and I can tell that you’re buying them from the same network, and here’s an example page from ketv.com where both of you are even on the same page, and it’s not doing you any good at all: that just made my day.
Whats the point? Google knows way more about your link network than you think. So stop trying to game Google and focus on building a good site with great content. Spend more time on clean SEO and creating something people will want to link to.