Sorry if this has already been answered early in the thread.
Looking at that per transaction bonus, does it count if you have lets say 2 or 3 transactions within a few minutes of eachother at the same place? For example going to target and buying a vacuum cleaner and a pair of pants and asking the cashier for separate transactions?
Or to a more extreme example, what were to happen if I were to go grocery shopping at a nice quiet time, headover to a self checkout machine and proceed to ring up each item individually? Does amex shut you down over this sort of behavior?