There is another Amex Sync offer but this one seems to be more tightly targeted than others. I say that because several people I know did not get it and it was not available on any of our 9 American Express cards. But, on the chance that it is available for you, here are the details!
This offer is for $20 back on purchases at Amazon of $20 or more. That is a phenomonal deal! Some people are having this available on multiple cards, many others not getting it on any cards. To check to see if it is available for you, login to your American Express account.
At the bottom, select the tab Amex Offers For You. These offers are different for each of your cards so you will need to select one card at a time to check for the offer.
If it is available to you, press the Save Offer button and you are set to go! The promo offer runs through August 31 and, as always, is limited. That means, hurry up and get the offer if it is in your account!
This offer is available for items purchased from Amazon.com, no third-part resellers. Make sure you follow the terms (see below) and you should receive a message shortly after your purchase stating that you have successfully used the offer!
Get a one-time $20 statement credit by using your enrolled Card to spend a total of $20 or more online at Amazon.com by 8/31/2014.
Offer valid only for purchases on Amazon.com or smile.amazon.com. Amazon Payments are excluded. Not valid at non-US or non-English versions of Amazon.com or websites affiliated with or linked to Amazon.com. Must add offer to Card and use same Card to redeem. Your transaction must be made directly with Amazon.com to qualify. Items ordered during the offer period but shipped after 8/31/14 may not count towards your qualifying purchases for the offer. Offer is non-transferable. Limit 1 statement credit per American Express online account. Enrollment is limited. Statement credit will appear on your billing statement within 90 days after 8/31/14, provided that American Express receives information from the merchant about your qualifying purchase. Statement credit may be reversed if qualifying purchase is returned/cancelled. If American Express does not receive information that identifies your transaction as qualifying for the offer, you will not receive the statement credit. For example, transactions not made directly with the merchant will not qualify. Also, in most cases, you will not receive the statement credit for transactions made with electronic wallets or via third parties. If you use Membership Rewards points for all or any portion of a transaction through the “Shop with Points at Amazon.com” program, the amount of that transaction that you cover with points will not qualify for the offer. Amazon.com is not a sponsor of this promotion. POID: BD4Q:0002