Just saw this in shopback app earn more tab.
As far as I know, Bunnings gift card can only be used in store.
Terms and Conditions
This challenge entitles you to $2 bonus cashback when you purchase a $20 Bunnings Warehouse gift card from ShopBack Gift Cards between 21st September 2021 12.00pm AEST and 30th September 2021 11.59pm AEST.
• Only purchases made after you ‘Start’ this challenge will qualify for the bonus cashback.
• Limited to one bonus per customer.
• Available while redemptions last.
• The $2 cashback is in addition to the regular cashback you’ll receive for purchasing a $20 Bunnings Warehouse gift card from ShopBack Gift Cards.
• The bonus will be added to your account within 48 hours of purchase.
• Cashback will be forfeited if any fraudulent activities are detected, or if your order is voided.
• ShopBack reserves the right to amend or withdraw the terms and conditions, and terminate the offer at any time without prior notice.
• ShopBack reserves the right to invalidate any order that does not comply with the terms and conditions.