You’ve heard the claims before. If reader comments are any indication, many of you have even lived them. They’ve never been proven, but time and time again, small businesses accuse Yelp of “extorting” them by holding positive reviews hostage until they pay for advertising.
http://www.webpronews.com/business-courts-negative-reviews-as-middle-finger-to-yelp-2014-10
Toms Blog on Life and Livingness