you can use it with the AMEX offer (https://www.ozbargain.com.au/node/125227), if you still have it ;)
The offer is available online only from Tuesday 7 January 2014 to Sunday 12 January 2014. Click & Collect purchases are eligible for this promotion. Sales of gift cards are excluded from the promotion. Promotional gift cards will have an expiry date of Friday 28 February 2014. Gift Cards can only be redeemed in-store. Gift cards can not be redeemed at davidjones.com.au and shop.davidjones.com.au. The recipient of the qualifying order will receive the bonus gift card.
Can we buy $200 gift card and receive the bonus?