I've got three of 'em up at the moment. Seem to be getting visits, but absolutely no clicks. There's no traffic stats, so I can't tell if they are any kind of real visits or just bots.
I've always had two problems with Chitika - for one, they seem to be very heavily weighted towards electronic/computer equipment, which is fine for those who are into it, but I don't usually play in that niche. And the other is that I never liked the way the minimalls looked.
The parked domains *look* pretty good. But, to quote a well known movie - show me the money. I haven't seen it yet.
Also, yesterday I was contacted out of the blue (on WMW) by a Chitika rep wanting to help me place some of their promotions on my developed sites; maybe they've got a big push on to get some fresh business going.