I could be earning $20 per day, but I'd rather leave them off the most active part of my ad inventory because I make more with Adsense. By dropping them in a less popular real estate on my site I'm making around $3.
I've gone as high as $12 a day but lately even with the same amount of traffic, I'm only seeing about $4-5 a day. Lame...
In my opinion, if chitika could earn you $20 a day, you are still losing money, because adsense will earn you more 10 times out of 10.
Infolink is a total rip-off. The ctr is pretty good for me, but the ppc is putrid. I have relegated them to the dungeon. They tried to fool me with a very high ppc on the first two days of implementation, but after that.....KAPUT!