We know that only Google and Overture you must use to sell somethig on the Net, the other pay per click search engines are good for lead generation. Why? Becouse the quality of the traffic. Google protects the kind of traffic its partner website are generating, but the other websites (except Overture) are not so targeted.
But the “other” seach engines have an advantage: low cost, and with this you can make any lead generation page and use the traffic from them to get the emails of you prostect and then let the autoresponder doing the rest.
Strategy for Internet Marketing 