USA visitors is good, those ads typically have higher CPC. The highest CPC values are probably found in computers and plasma TVs.
Why are you SPAM DP with click-share.... beware people CLICK-SHARE is a scam... Nobody got paid from them...
I have been using Chitika for over a year now I think and I have always gotten paid. Only time I had an issue one month they really dinged me on adjustments at the end of month, but besides that, have not had any problems getting paid.
$0.3 per click at average?? with what subject? this cpc is high! I think chitika is a good adsense alternative, I use bdvrtsr for gambling and is average good... I write something about a good free PPC ads promotion to start there.
I have heard that Chikita is only good if you have a massive amount of visitors. Otherwise its better to use adsense and other networks.