Seems it's targeted. check your Shopback APP. Limited spots
I bought something on Amazon via Shopback last week. Not sure if that's the reason why I was targeted
Terms and conditions
• This challenge entitles you to $10 bonus cashback when you spend $10 or more in a single transaction (minimum spend does not include GST charged at checkout for international items, delivery and all other fees) at eBay Australia through ShopBack between 1st May 2022 12.00am AEST and 31st May 2022 11.59pm AEST.
• Multiple items may be purchased in a single transaction to reach the minimum spend.
• 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 $10 bonus cashback is in addition to the regular cashback you'll receive shopping at eBay Australia.
• The $10 bonus will be added to your account once your regular cashback turns Confirmed.
• Purchases that do not count towards this challenge are those in which do not meet the store's respective terms and conditions (including but not limited to cancellations, returns, exchanges, using unapproved coupons, purchasing excluded products/categories).
• Cashback will be voided if any fraudulent activities are detected or if any terms and conditions are not met.
• ShopBack reserves the right to amend or withdraw the terms and conditions, and terminate the offer at any time without prior notice.
Cheers OP, I wouldn't have known if I didn't see this post.