How are these people a threat to Craigslist business? The more people use its data, the more valuable it becomes to post to Craigslist, and the more market shar

How are these people a threat to Craigslist business? The more people use its data, the more valuable it becomes to post to Craigslist, and the more market share Craigslist gains. Craigslist does not lose a dime because of third-party mash-up sites.