Murphy USA, a chain of American gas stations, has traditionally only used signage to reach new customers. However, after launching a customer loyalty program though a geo-social media platform, the brand told ClickZ it is seeing a large influx of new customers.The chain found that 44 percent of Whrrl users who have checked in to a Murphy’s location have never given the brand any business in the past. Additionally, these customers are three times more likely to visit than regular Murphy USA customers, while 85 percent....