Found this whilst browsing the IKEA site.
It doesn't seem to be on the T&Cs page yet but the tile appears on store specific pages. T&Cs
IKEA Family member offer:
Valid Friday 1 Nov - Monday 11 Nov.
Shop in-store and receive an IKEA voucher to save on your next visit between 12 Nov - 31 Dec 2019.
Spend between $100 to $249.99 and receive a $20 voucher.
Spend over $250 and receive a $50 voucher.
Promo tile only shows on these four store pages: Available at all stores
Marsden Park (https://www.ikea.com/au/en/store/marsden_park/)
North Lakes (https://www.ikea.com/au/en/store/north_lakes/)
* T&Cs state $10 voucher per $100-$249.99 spend. However, email sent out to members confirms that it is a $20 voucher.
* Your voucher will be printed on your receipt, so make sure you hang onto it!