I have been an American Express cardholder for 10 years, longer than any other card. But that recently changed.I have a High Yield Savings account and have never been treated this way by a financial institution...especially one in which I have been a loyal customer for years.They literally blocked transfers and interrogated me. I'm not sure if their security department is outsourced but it was sooo odd.I will be closing my account. My bank has the same rate and they treat me like an actual customer.