You got to hand it to these guys. Craigslist earned almost $4.5 million in recruitment advertising from Oct. 25 to Nov. 25 -- almost $637,000 of it new revenue, the direct result of adding eight new cities to the list of markets in which it charges per listing.

These are our estimates. Craigslist, which is private, doesn't report revenues. However, it's fairly easy to count Craig's listi

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