Alternative PPC [ Pay Per Click ] Besides Google Adsense

Talk about online business, not foreign if we hear about Google Adsense, the broker advertising. Except Google Adsense, there are many of broker advertisings as same as Google Adsense. Those are:

• Chitika - http://chitika.com
• Bidvertiser - http://www.bidvertiser.com/
• Infolinks - http://infolinks.com/
• Clicksor - http://www.clicksor.com/
• BuySellAds -  http://buysellads.com/
• Puxee - http://puxee.com/

I just found those 6 sites, from the King of Search Engine: Google.