They only traffic worth buying is the PPC stuff on the search engines etc. I tried the 10,000 clicks for $40 crap a year or so ago, and it is just a complete waste of time and money. You could watch the bots visit 7 seconds, log off, then ten seconds later, another visit for 7 seconds (different IP of course), etc etc, you get the picture. Total junk – Avoid!
Cheers
Dave