I'm thinking of applying the Discover Card's Alamo coupon where a $20 rebate translates to $40, for a rental at FLL in a couple of weeks. The relevant part of the T & C is:
Valid for new reservations only; cannot be applied to existing reservations or completed rentals. One certificate per Alamo rental and void once coupon code is redeemed.
I would plan to use it, but if I should postpone the trip because of an approaching hurricane or I have the flu, would I have lost it? I'd like to consider these small but real possibilities. I would probably change the dates on the reservation rather than cancel it. The base rates are already rather high; I wonder if I risk them getting higher if I wait until a closer date and I'm surer of making the trip. I used this type of coupon previously and think I added a code for extra Southwest credit after completing a booking with the coupon code; is the code "redeemed" when the booking is made or when the rental happens?