A good discount with what appears to be a decently sized pool of eligible items.
For example this Google Chromecast with Google TV from Big W would be $69 with eBay Plus.
In the past you could pay the full value with gift cards, not sure if they patched that like Afterpay, please comment if you know. *Confirmed below by @cooni.
You do not have to save your card details for future purchases.
This offer entitles you to $10 off the pre-coupon purchase price (excluding postage costs) on Eligible Items during the Offer Period, when you spend $50 or more (excluding postage costs) in one transaction using a credit card or debit card (Visa, Mastercard, Amex, Discover). Multiple items may be purchased in 1 transaction total (up to a maximum of 10 items per transaction).