i recommend not to. i've tried trafficholder.com and it didn't monetize, because it's not targeted traffic.
If you are just starting out never tend to buy any traffic as you can lose your money very easily. Instead learn for a month or two about all traffic generation methods and meantime use free methods like article marketing, forum posting, etc.
creat your own traffic. there is a book im reading called Guerrila social media marketing. it teaches you how to market better and creat your own traffic with our having to buy it.
I wouldn't do it...most of those are scam programs and they are not going to be targeted traffic like someone else said. I have done them before and NEVER brought me one single sale. If you want instant targeted traffic go to payperclicksearchengines.com there are a lot of pay per click companies besides Google. Google is good, but will cost you a lot more than others. I hope this helps you