Found this text in the T&C's on the landing page which mentions 500 bonus Qantas points after spending $50 or more.
^^15% discount applies when using only points from 12:00am (AEST) 22 October 2023 to 11:59pm (AEST) 26 October 2023. 15% discount is applied at checkout and available on eligible products. Exclusions apply - for a full list click here. If you use Points Plus Pay a lower discount may apply. The discount cannot be used in conjunction with any other offer, promotion or benefit. Qantas may extend or withdraw this offer at any time. Bonus points offer applies when using cash only or the cash component of Points Plus Pay and ends 11:59pm (AEST) 26 October 2023 unless sold out prior. 500 bonus points will be earned when you spend $50 cash at Qantas Marketplace. Qantas Points will not be earned on any orders made completely with Qantas Points, or on Offset Your Home and Car and Climate Positive Delivery. Bonus points will be credited per qualifying transaction. Qantas Points will be credited to the member’s account up to 30 days from the date the Retail Reward is dispatched. Qantas may extend or withdraw this offer at any time. Conditions apply.