http://ebay.com.auLooks like signing up to a trial is also eligible for entry.
Who can enter the Promotion?
The following customers will automatically be entered into the Promotion if, during the Promotion Period, they are: an Australian resident; and 18 years or older; and not an employee, contractor (or an immediate family member of an employee or contractor) of eBay Inc and its related bodies corporate or the Promoter and its related bodies corporate; and an eBay User who
can see the Promotion advertised on eBay.com.au while logged into their account and/or receives an email from eBay advertising the Promotion; and who signs up to eBay Plus membership between 3-6 December 2020 through a free trial or paid membership.