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[$$] Yelp Shares Surge on Ad Business Growth

Yelp Inc. shares gained about 29% in trading Thursday after the online review company had record growth in paying advertising accounts and stronger-than-expected ad revenue in its latest quarter. San Francisco-based Yelp said the growth was driven by increasing its sales force and ending a requirement for business customers to commit to a fixed time period for ad spending. Yelp said Wednesday that advertising revenue in the second quarter grew 21% from the prior-year period to $226 million.