As a new member here, I had a closer look at those sellers claiming Thousands of unique hits for few dollars. First of all, if you haven't noticed, I am going to get straight to the point: DO NOT WASTE YOUR MONEY! Below are few tips that will help you as a buyer: 1)Before you purchase, take a look at the reviews. When they offer 20,000 unique hits and you only get 200, then there is something wrong. 2)Of course it is not Adsense safe Since you are getting too many repeated hits from the same ip address, it will raise a "RED ALERT" which will get your account banned. Anyone can write Adsense safe, that doesn't mean it is safe. 3)Most of them are either using frames or bots from the same ip. 4) They all have one thing in common: They will not tell you exactly how they bring in the traffic. Most of them copy each other by stating things like "Url redirection, expired domains, Advertising network they own" None of it is true as far as I have seen. Conclusion: Most of them are FAKE. You will actually do more harm to your site than benefit. Your Alexa rank will even go down as I have seen from some reviews. So Be careful. PS: If there is a good service out there, let me know.