In late 2009, a few months after it had graduated from YC, Airbnb appeared to create a mechanism that automatically sent an e-mail to anyone who posted a property for rent on Craigslist, even if that person had specified that he did not want to receive unsolicited messages. If the apartment was listed in, say, Santa Barbara, the e-mail would read: ‘Hey, I am e-mailing because you have one of the nicest listings on Craigslist in Santa Barbara and I want to recommend you feature it on one of the largest Santa Barbara housing sites on the Web, Airbnb. The site already has 3,000,000 page views a
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