Was looking at pressure washers and noticed this showing up under the product description. Not sure if it's targeted, but worth trying if you're looking to buy something in lawn and garden.
-15% with max discount of $15
-only works for products shipped and sold by Amazon
-apparently only for first time orders in lawn and garden category
-must use some Amex rewards points
-enter promo code AMEXGARDEN at checkout
YMMV as always on these AMEX deals.