I think this is an instance of URL hijacking. Usually scammers register an URL which is similar to a company URL, especially as it might appear if mistyped or mispelled, so that of the many millions of customers who log onto the site, a significant percentage end up at the scam site. The scammers then demand money to give up the scam URL. This, however, seems to be a search engine scam: registering a similar-sounding URL so that their site appears in a search result along side the legitimate company name.
I did the same search as you on MSN and got 3 sponsored ads at the top, five at the side, and the ad-scam link was number five.
In the same search with Google I got 7 sponsored links to the right of the page but the scam link did not appear, at least on pages 1-5.
Perhaps Google is a better option if you want to avoid these scam ads, and If the ads on Google are too intrusive, you could block them with RejZoR's block list.
Curiously, I only saw one ad link on the scam link page. How many do you see? I use Spybot S & D bad server blocking, IE-Spyad, mvps hosts file and Firefox Adblock, so maybe something is blocking most of the ads if you see many?