Can add-on AND primary cards take advantage of this offer? they have their own amex login accounts and registered independently successfully for the promo. Primary card purchase tracked correctly but not the add-on card purchase. Anyone know? TIA.

DH and I are AUs on each other's card but we noticed the offer is ONLY set on the primary holder's card number as specified in Amex offers for you tab. If one uses the AU card to purchase let's say $20 on amazon, they will not get the $20 credit especially if there is already a $20 credited to the primary card's number.

afaik, for cards with AUs, all transactions go on the the primary cardholders account and that is how they can easily track how many statement credits an account got; so it is unlikely that AUs can avail of the same offer limited to one per account, which I don't mind.

I got an email for my Bestbuy transaction, but I've found that you don't always get emails for the AmEx sync offers. I didn't get an email for the Amazon one, but the credit posted anyway. Give it a couple of days.

Credits for my amex blue and spg have posted but serve credit has not posted although the transaction moved from pending to posted. Looks like serve is slower to post.

just curious, how do you access the Amex offers on a Serve card?

I synced with twitter. Got confirmation emails for registration and spending

Same here .... got credit for all other amex cards 2 days ago but Serve.

Real American Express Corporation american express cards can always do all Amex sync deals on Primary and Authorized user cards - you just have to sign up separately, as each card has its own number. IE, for twitter, you have to sync them each to a different account. For Americanexpress.com, you have to have a separate sign on for your authorized user card.
For other Amexes, ie Fidelity 2%, Wells Fargo Propel, etc, you can only do twitter/facebook/foursquare offers and only on the primary cardholders card.

For this one in particular I have only currently done the offer on the authorized user cards so far (3 of them) and got the email for all 3. Virtually every offer I have ever done I have done across 7 cards and had no trouble with it crediting automatically for either primary or secondary users. Sometimes I don't get an email, but never actually didn't get the credit.

After reading here today, I signed into my DH's Amex GP AU account and did see the Best Buy offer for him even though I had clicked on mine two days ago.

Too bad he took the card overseas with him.....

Thats what I noticed too. Thanks taking time to write a such a long and detailed explanation :)

Follow up : I got my $25 statement credit on 2 of my cards today so I am pretty happy about that! So far I like MS and the massive about of information that this community has to offer! Thanks again to anyone who replied. :)

Soon you'll be floating 25k a month and wonder "how did this happen?" Lol.

Are these cards loading normally at WM?

Affirmative

i'm so sorry you were absolutely right - F5 works too; a knowledgeable cashier chose F5 today and then went straight to scanning the strip, and it worked perfectly! so much faster then the F6, F5 i think most other cashiers usually do. thank you for pointing the F5 key out - i wouldn't have noticed it today if you hadn't mentioned it (and the easier it is to teach new cashiers the better for all of us ;) )!