Check your Seller Hub page for this promotion. I did not get it by email or in their Messages box. I am sure it is targeted.
I saw this Promotional Offer in my Seller Hub:
Receive 100% off your eBay Final Value Fees for the next 30 days for new listings you create on eBay. T&Cs apply.
Note this condition:
What is the Promotion?
Pay no Final Value Fees (“the Discount”) on any new fixed price listings that are listed once and sold during the Discount Period.
Which means the no FVF only applies when your item is SOLD WITHIN the discount period.
There's no limit on the number of listings in their T&Cs.
30 days start when you activate the offer.
Link to Seller Hub
Nothing for me, haven't had any for a long while after changing to managed payments. After a month long battle to get my fees back for the Gumtree promotion eBay can go to hell!