AmEx - Heinemann Duty Free Spend $75 Get $15 Credit

Old deal which I'm not sure the manual link ever got posted for

Spend $75 or more, get $15 back
Save offer to your Card and spend $75 or more, in one or more transactions, in-store at HEINEMANN Tax & Duty Free SYD Airport or online at heinemanndutyfree.com.au by 31/12/16 to receive one $15 credit. Limited to the first 60,000 Cards to save the offer.

OFFER TERMS
Save the offer to your eligible Card and spend $75 or more on that Card, in one or more transactions, in-store at HEINEMANN Tax & Duty Free Sydney Airport or online at heinemanndutyfree.com.au by 31/12/16 to receive a $15 credit. Limited to the first 60,000 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 HEINEMANN Tax & Duty Free Sydney Airport. For example purchases made through a third party payment processor like PayPal.
Offer valid at Australia Sydney Airport location and heinemanndutyfree.com.au only.
Only valid for American Express® Card issued in Australia, excludes American Express® Corporate Cards.
Online purchases can be made no earlier than 30 days prior to the nominated collection date (departure/arrival) and no later than 48 hours prior to the nominated collection date (departure/arrival)
Online orders are subject to terms of use available on: heinemanndutyfree.com.au/sydney_en/terms_of_use/
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.