I opened the eBay store page on my desktop today and was presented with this offer via a middle-of-screen notification. It appears to be targeted. I have linked to the T&C's, but a TL;DR is below.
The offer entitles Eligible Customers to $5 off the purchase price (excluding postage costs) on all items listed on eBay.com.au, except the Excluded Items, when they spend $30 or more using the eBay App. A maximum of 1 transaction applies. Multiple items may be purchased in one transaction (up to a maximum of 10 items per transaction). All monetary amounts specified in these terms and conditions are in Australian dollars (AUD).
As per the T&C's, the end date varies depending on when you are targeted. Mine ends 11:59pm on the 17th of Feb.
I wish they would bring the free and $1 listings back - they were well useful