This sounds like a fairly typical list broker operation, with a somewhat crowdsourced twist. A bit more wired, but not particularly new. If you are thinking of

This sounds like a fairly typical list broker operation, with a somewhat crowdsourced twist. A bit more wired, but not particularly new. If you are thinking of selling lists be aware that there are lots of competitors and that the industry as a whole is not in good repute. You would be up against folks like http://www.infousa.com/ http://www.infousa.com/