"Credit card firm cuts off gun store for selling guns"

Apparently, after a business arrangement over four years, a credit card company severs its business with another company because it sells firearms or similar products.  Fox News has the discussion here.  Hyatt Coin & Gun in Charlotte, North Carolina is the nation's largest gun store.  The credit card company said that it was a violation of their agreement not to work with companies that sell guns, but Hyatt even has the word "Gun" in their name.  Politics?  Authorize.net (contact info here) is the company that cut off Hyatt.