It is there on purpose. It serves several functions:
1.) I'm experimenting with some stuff for a new site. I want to see how this kind of link would work.
2.) I found in the server's log that a lot of people got here looking for Microtel PCs. Now I can send them to the right place.
3.) If somebody happens to click on the link and buy a Microtel PC, we get some comission that will help with the hosting for LJR.
Don't worry, it does not mean that ads will start popping up all over LJR, but this one helps with my experiment and also relevant and helpful to the site.