$5 Promotional Credit (No Min Spend) When You Add a New Debit/Credit Card @ Amazon AU

No idea what made me targeted, noticed this in an empty cart on the iOS app.

T&Cs:

This promotion credit is available only to customers who were served an “Add-a-Card” advertisement and added a valid, non-expired qualifying debit card or credit to their Amazon.com.au account by clicking the ‘Add a Card’ widget from the advertisement. Offer limited to one promotion credit per customer account. This offer is not available to customers who previously participated in an “add-a-card” promotion on amazon.com.au. Promotional credit will expire 30 days from the date of issuance. Promotional credit will be applied automatically as a discount to a customer’s next eligible purchase(s). Unless otherwise stated, promotional credits issued under this offer may only be applied towards products sold by Amazon or third party sellers on Amazon.com.au but excludes the following: Amazon Music Unlimited, Amazon Prime, Amazon Prime Video, Alexa, Cloud Drive, Gift Cards, gift wrap charges, Kindle Unlimited, delivery charges, goods and services tax (GST) and selected merchandize (wine and GameGear). If only a portion of promotion credit is used towards a purchase, the remaining value will be applied to subsequent eligible purchase(s) as a discount, provided the promotional credit has not expired (30 days from the date of original issuance of promotional credit). If products purchased with promotional credit are returned, (i) a customer’s refund will equal the amount paid for the product, subject to applicable refund policies; and (ii) the value of promotional credit which formed part of the return will be applied as a discount against future eligible purchase(s) provided the promotion credit has not expired. Shipping charges and taxes may apply to the full value of discounted and free promotional items. Customers are responsible for the final purchase price after the promotional credit is applied, plus applicable taxes and shipping charges. Amazon reserves the right to modify or cancel the offer at any time. If you violate any of these terms, the offer will be invalid, and the promotion credits will not apply. This offer may not be resold, is non-transferable, not redeemable for cash, and is void where prohibited by law and in case of fraud. This offer may not be combined with other offers. Promotional credit cannot be used on pre-existing orders.