TECH CRUNCH - Dec 30 - Foursquare, which this year passed its three-billionth check-in, added 15M more users to its network, and in October kicked off a new chapter as a stronger competitor to Yelp with more local information and reviews, is now updating its privacy policy to keep up. It will use full names and will let businesses access longer data logs for individuals. Both of the changes are a signal of how Foursquare is beefing up its big data offering: more information being shared with more people — and importantly, businesses as part of Foursquare’s local-commerce dashboard play.