In a recent development, several employees at Target Corp. have reportedly been let go for allegedly violating an unwritten rule that mandates a 15-minute waiting period before employees can purchase merchandise. What Happened: The unwritten rule requires that merchandise be available for customers on the sales floor for at least 15 minutes before employees can purchase it. Troy Logan, one of the dismissed employees, stated that he was unaware of this rule when he bought a Stanley insulated cup that had been released from an online hold, reported Business Insider. Logan, along with other termi…