Foursquare launches promoted updates – now all social networks have ads in your news feed

It’s official, all the social networking sites have started adding “promoted” tweets/posts/places to your news feed. It’s no surprise considering that Twitter, with its “promoted tweets,” recently said it has a “truckload of money in the bank”.   Today Foursquare is launching its version of search ads, Promoted Updates. Promoted Updates operate like Google’s promoted listings or Twitter’s …