As people do more and more shopping online and the economy has slowed, brick-and-mortar retailers are suffering. And closing. Weakened companies cannot afford the real estate and personnel costs that go along with supporting hundreds of unprofitable locations. The clearest proof of the problem was RadioShack's recent decision to close more than 1,000 stores. Gap has closed 20% of its locations in recent years, and Macy's, which is going strong with earnings, has closed stores recently as well.