Chase Amazon.com card sucks.
Below mediocre sign-up bonus. 3pts for amazon purchases? You get 5 on Citi Forward (also Discover More Q4 2012/Chase Freedom Q4 2013) and Chase Sapphire Preferred 2X on restaurants. Blue Cash Everyday or Blue Cash Preferred from AMEX for gas.
It's seriously not that good of a card. I opened mine in June, I'm transfering the credit line over to my Chase Freedom and closing the card.
YMMV of course.