A common type of AMEX Offer is bonus MR earnings, such as the recent Tiffany offer.
Normally, MR-earning cards should allow only one card to add this offer, but similar offers have also appeared on the AMEX Delta Gold card and Hilton cards. These can be added together with the MR offer. So if you're planning to buy a multi-carat diamond ring, this is your chance to stack a small discount.
- Delta offer
- Hilton offer
- Marriott offer
So far, we have only seen the Tiffany offer. It is still unclear whether AMEX will roll out more offers like this in the future that give bonus earnings in different types of points.
For a detailed explanation of AMEX Offer, see: