Quigo – part of Advertising.com it’s a self-service solution.
Adbrite – Lots of cheap traffic. Test it out first
Pulse360 – Nice content network with lots of potential. You can reach out to sites like FoxNews etc.
As you can see there are plenty of advertising networks that you could use to expand your ppc campaigns. In many cases your cost per click will be even lower with those networks than with Google Adwords.
By the way don’t forget to track your results. I usually have different tracking links for each network I use so that I can determine which one is producing the best results for which CPA offer.
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