Originally Posted by
knicknut
... a standard, post-paid rate through a portal (like for business travel), and having it qualify for these promotions? Yes, no, or YMMV?
Walk us through how the transaction gets charged. If you use the portal to book the rate, but free to use another card for the charge during checkout, then yes, present your Amex and you will get it.
If the portal locks in the rate AND the card, and IF you can charge on your Amex, then it matters how the transaction comes through. If it shows the hotel property name, then yes. If it's the travel agency portal name, then no.