Typically how long does Amex require you to hold a card before you can product change it? Isn't it about a year? I would think most people who have the Blue for Business got it during one of several recent promos and may not have it a year yet. Certainly I don't see why anyone who's had Blue for Business less than half a year and is busy working on the (stacking) 10x restaurant promo for 6 months would even be interested in product trading their card yet.