Wow !! Didn't think Groupon would ever offer this nice discount on gift cards. Best we've ever seen was 7.5%.
According to the comments towards the end , you can stack this with the 10% off $100 Big W Offer to use at any Woolworths Group Store. You should get the Groupon eGift card emailed before expiry of the deal
Feel free to use my referral link to buy the deal https://www.groupon.com.au/visitor_referral/h/b3a8ece9-5cc5-...