And I didn't earn anything at all! The site I put the ads on gets over 400 uniques a day, mostly from google and adsense was bringing me only around $3-5/day - clicks are were very low, but ctr is high so I thought I'd use chitika. I tried a banner and content based ads (I removed adsense before putting chitika, so don't accuse me of breaking any terms) and keyword based ads and I have really no idea why everyone is so curious about it. Now I've put revenuepilot, lets how good will it be...
Some sites work better with Chitika and some with Adsense. You just have to experiment. I would have probably given it longer than 2 days though. Just a note that Chitika ads work best on products pages.
I'd also recommend you to try it a little longer. You should especially test different keywords for your ads until you find some your visitors show interest in... And you know you may in fact use AdSense together with Chitika? That's another thing I'd recommend, as Chitika does work very good as a supplement to AdSense on most sites.
No, as long as you don't use Chitika in contextual mode you may use it together with AdSense on the same page. There were very many discussions about this and I think Chitika says so on their website, too.