This was shared to me so full credit to the OP.
Not sure if it's nationwide but the T&Cs mentions "Coles Supermarkets".
Limit 5 gift cards per customer. Offer valid only in store at Coles Supermarkets (excludes Coles Online, Coles Express and purchases via giftcards.com.au or coles.scanshoppay.com.au), subject to store availability. Excludes $30, $50, $100, $200 and Variable Load Apple Gift Cards. While stocks last, no rainchecks. Offer valid from 1/2/2023 to 7/2/2023. Refer to individual gift card for terms and conditions.
Is this also on sale in QLD Coles stores? Or just NSW?