Office Depot has been a personal favorite for many miles enthusiasts because of the ability to purchase Vanilla Reload cards. These Vanilla Reload cards are essentially digital cash cards that you can use to fund your American Express Prepaid Card–and now the American Express Bluebird Card. The real advantage was when you leveraged it in conjunction with a Chase Ink credit card or charge card (Ink Bold or Ink Plus), which gave you a bonus of 5 points per dollar spent at office supply stores like Office Depot. That meant…… (click read more!)