Mashable posted a fascinating article today about how McDonald's spent a modest $1,000 on a pilot Foursquare campaign resulting in 33 percent more foot traffic in one day, more than 50 news articles, and 600,000 people opting to follow and fan the brand on social media sites. McDonald's Foursquare Day on April 16 used 100 randomly awarded $5 and $10 gift cards to lure Foursquare users into McDonald's restaurants to check in. Foursquare is a mobile … [Read more...]