Ok, question to the great minds of WPW.
I have been looking at what constitutes Black Hat SEO for some time now and cam across something I was curious about.
I was at a website that allowed users to purchase back links within their articles. The website is text based and has a ton of information on an incredible amount of information. They allow you to purchase a backlink based on a keyword phrase that you choose. The one that got my attention was about website design and the keyword phrase I would be interested in is in this article. I can purchase the back link rights to that keyword phrase as little or as much as I want on their website. It turns the text from standard text into a relevant anchor tagged back link.
Would this be a violation of the big G's terms of service or did someone find a loophole here?