I know most people are saying that Exactseek.com doesn't deliver squat worth in clicks and that most of their clicks are useless. But it seems that if you purchase keywords like Ebay, Myspace, Google, etc. you'll get your moneys worth. It's only been two weeks and I've received almost 100 clicks for the keyword "Ebay". That's about 600 clicks in 3 months if you do the math. I think Exactseek.com is worth looking at if you're giving away something for free and just need traffic in general. It may not work that great for niches though.