Most likely a targeted offer and AMEX issued cards only but the title isn't long enough for me to include that.
I didn't get an email about it but noticed it as on offer on the new amex online banking. Log into AMEX online and go to your account summary (MY ACCOUNT then Your Account option). There is now a few tabs:
Latest Transactions, Offers & Places, Card Benefits. The below two offers appear for me (BMW AMEX):
DAVID JONES
RETAIL / Spend $150 or more, get $30 credit
Spend $150 or more on the saved Card in one or more transactions at David Jones, in-store or online, before 30/11/13 to receive one $30 statement credit. Limited to first 5,000 Cards to save the Offer.
&
HARVEY NORMAN
RETAIL / Spend $120 or more, get $30 credit
Spend $120 or more on the saved Card in one or more transactions at Harvey Norman before 31/1/14 to receive one $30 statement credit. Limited to first 5,000 Cards to save the Offer. Product exclusions apply.
Also offers for JURLIQUE, Event Cinemas & Red Balloon.
If you get an error after hitting save offer, log out and back in after 5 minutes and it should appear in your saved offers.
How about AE Card I applied from DJ? I don't even have a login?