Steve Jobs apparently called the Stoppelman himself, and told the CEO to "stay independent and not sell out to Google." Although the deal was already broken by that point, Steve "liked yelp and wanted to make sure about Google."
Interestingly enough, Yelp's most important, and arguably favorite feature -- its user reviews-- weren't originally part of the service. The company realized after the failed launch that the reviews were something very popular, and began building a new site centered on reviews.
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