I have found some very interesting sites: 4.gsm.pl dla.gsm.pl nokia.oferuje.pl wap-mms.gsmde.gildia.com And a few more.. They are all exact clones, they are all running co-op ads, and they have thousands of pages indexed by google. And probably they all have separate accounts in coop ;] The guy who owns this crap must have quite nice weight lol.
The question that springs to mind is: Is PR and keyword relevancy from duplicate pages penalized by Google?