gift cards can be triple/quadruple-stacked :)
$50 My Wine Guy Voucher Offer: This offer applies to any purchase of a full price Good Food Gift Card at https://goodfoodgiftcard.com.au/ completed by 11.59pm (AEST) on 3 December 2017. This offer cannot be redeemed with any discount offers for Good Food Gift Card. After 3 December 2017, eligible purchasers aged 18 years and over will receive a complimentary promotional code for a $50 My Wine Guy voucher redeemable at https://www.mywineguy.com.au/.
Fulfilment of Digital Voucher: This offer is brought to you by Good Food Gift Card and My Wine Guy for eligible purchasers aged 18 years and over. This offer cannot be redeemed with any promotional discount offers for Good Food Gift Card. $50 My Wine Guy offer is subject to the terms and conditions at https://www.mywineguy.com.au/. Your promotional code must be redeemed for one voucher at https://www.mywineguy.com.au/. For redemption enquiries please contact (02) 9045 5617. This offer cannot be combined with any other voucher or credit. Promotional codes and vouchers may not be used in conjunction with any other codes or vouchers - strict limit of one voucher per order. Each voucher and credit will have an expiry date, after which the voucher or credit will no longer be redeemable. Your voucher must be used in a single transaction, any remaining amount not used in this transaction cannot be applied to subsequent purchases and no refund or credit for any unused amount will be provided. Voucher not transferrable for cash.
Just a warning that the ability to stack the good food card with other offers (i.e. entertainment book) varies by restaurant. I was recently refused a request to use the Entertainment card in conjunction with the good food gift card. From the FAQs (https://goodfoodgiftcard.com.au/Faq): "Good Food Gift Cards cannot be used in conjunction with any other promotional offer unless otherwise advised by the individual restaurant."