One problem with some of these so-called traffic sources is that they send you hits from hundreds of domains using blurred popup scripts. The surfer clicks a link and some site loads, and yours loads in behind that site. The problem with this technique is that a good many surfers will simply close your page out, because they didn't ask for it. This will burn your bandwidth but not show any productivity for you.
The difference with my sources (including Choker's traffic) is that your traffic comes directly to your site from <i>clicked links</i>, thus the surfers want to see what your site has to offer, and they click your links and make you money and feed your trades.
My sources are found at:
http://www.cdsmodels.com/traffic.html