Appeared on both my Amex Qantas Discovery main card and supplementary card.
OFFER TERMS
Save the offer to your eligible Card and spend $160 or more on that Card, in one or more transactions, online at myer.com.au only by 4/11/16 to receive one $40 credit. Limited to the first 10,000 Cards to save the offer.
Offer is limited to one credit per registered Card. Only spend on the Card number you register counts towards the Offer.
Excludes transactions where you do not spend directly at myer.com.au. For example, purchases made through a third party payment processor like PayPal.
Excludes in-store purchases. Offer valid at Myer Online Australian website only.
Credit is not redeemable for cash or other payment form.
Credit should appear on your billing statement within 5 business days from qualifying spend but may take up to 90 days from offer end date.
Credit will not be applied to your Account if it has been suspended or cancelled.
Credit may be reversed if your qualifying purchase is refunded or cancelled.
Full Offer Terms available here.
Mod: This is a targeted deal. To hide targeted deals in the future, click the hide link below and then check targeted deals. See this thread for more information.
thanks op - can see this on the CA platinum reserve card too