Yelp is a fundamentally flawed review service being kept afloat by investors desperately figuring out a way to make the platform profitable. Overrun with spammed content its filtering attempts have turned things from bad to worse, alienating businesses and users alike, while it is bogged down in extortion scandals and court battles. There is no doubt that right now Yelp can help bring in the business, or get rid of it, but I always question spending time and resource invested in a platform that may not be around for the long term. And there are plenty of reasons why Yelp …