When big chains are hacked, mom and pops cash in By: CNBC.com News August 07, 2015 at 12:57 PM EDT With Costco, CVS and Walmart's photo sites going down due to cyberthreats, local retailers are picking up the business. Read More >> Related Stocks: CVS Health Corp Costco Wholesale Google, Inc. Wal-Mart Stores, Inc. Yelp Inc