I've been using Kontera and got 4.49$ with 28 clicks I think this is pretty poor I know of others in-text-ads like chikta and adbrite how do these perform against kontera ?
I've used both Kontera and AdBrite in the past and Kontera is probably slightly better in terms of price per click. I still prefer AdBrite because it's easier to submit your site, get approval and implement your code on multiple sites. I'm only using AdBrite inlines now and I'm quite happy with their performance.
I have heard quite a bit about kontera. It seems to be quite popular making me believe that it's in the top tier. $0.16 per click is not bad at all, but then it depends on your sites topic I guess.