Qantas hotels will appear on your statement as either Qantas Hotels Pty Ltd or Hooroo Pty Ltd being the merchant.
For this Amex credit to work correctly you need Qantas Airways limited as the merchant, in other words the booking of airfares.
Note: in previous campaigns by Amex, the purchasing of vouchers will also enable the credit to processed. hopefully this remains the case this time too.
Thanks for the tip. I think this is terrible mistake for Amex to not mention it in their T&C's. All it says is that you need to make your purchase through qantas.com:
"Register by saving the offer to your eligible Card. Spend $350 or more on that Card, in one or more transactions, online only at qantas.com by 21/7/16 to receive a $50 credit."
Nothing is said about "eligible spending" - and the layman is unlikely to know what purchases will be processed by what subsidiary through the qantas.com website. All they can see is that you can book flights + accomm through qantas.
Normally this kind of thing gets addressed through the "eligible spend" criteria, which is not spelled out in the Full T&C's either.
The full T&C's state what is not eligible, but I don't think they've made it clear:
C. Transactions that are not eligible The following transactions are not eligible and will not count towards your spend for the purposes of the offer: - transactions where you do not spend directly with the merchant (for example, if you buy the merchant’s goods through a third party department store);
- transactions processed through a third party payment processor (for example, PayPal);
- transactions that are subsequently cancelled or refunded;
- transactions where you buy a gift card, store credit or a voucher.
The way I see understand it, Qantas in selling accommodation is the merchant.