AA is offering 20% discount coupons (plus double or triple miles) on Budget rentals of 2 or 3+ days:
http://www.aa.com/apps/netSAAver/Vie...omotionContent

I've never used these coupons before - does anyone know when the discount is applied? I enter the AA BCD (U072400) and get an initial quote. Then on the next page, I enter the appropriate coupon code (MUAZ077 or MUAZ084) and click 'Rent It', but there is no change in rate. Is the discount only applied at pickup or return?