our website recently purchased traffic - "targeted visitors" from a place called getcheaptraffic.com
it was a bit of a disaster. We bought 20k from u.s. and 15k from the uk, or something, paying $20 for the us traffic, and $40 for the uk traffic.
We were given the opportunity & selected 'business' 'webmasters', etc as the targeted categories.
the 'visitors' resembled a sort of attack. our index page was continually refreshed thousands of times by about 50 - 150 ip addresses from around the world.
Only the index page was seen. Nobody surfed into the site, and needless to say nobody bought anything.
Ok, we could have guessed this, but it was a test. Now we can confirm that this is a scam.
The worrying thing is that people probably buy this traffic & send it to affiliate / paying ad sites.