Adhitz vs Adsense vs Adbrite vs Chitika?

[BillEssley]

I am using Adsense for a blog more than 6 months but it is generating less revenue, maybe reason by it has less traffic. I did a research and found some alternatives to Google adsense is Adhitz, Adbrite and Chitika? Do you guys use it on your sites? what is your experience with these ad networks?