One of the biggest complaints about MSN was the amount of Spam that was present. Especially Sub-Domain Spam and Blog Spam. Thus, MSN Live was born. And of course, Blog Spam has creeped back in and is flooding the top ten results.
For example, Debt Consolidation is an area where I am an affiliate, and a search for “debt consolidation” is riddled with Blog Spam. The best part is these Blogs are using redirects to send to PPC hosted pages for monetization.