From what we gather, it's invitation only & also not available to stores.

We've had it each week on our non-store id. You have to accept the offer before you can start using it.

Look down the bottom of your selling page in the promotions secction tomorrow, and the accept button should be there. It won't show until tomorrow.

If it won't let you accept the offer, (as in my case) contact ebay Chat and advise it is not working and ask if any items sell, they will credit any FVFs over $1.00

 

It won't accept for me but each time I contact via chat (that way you get a copy of the transcript) and i get them to confirm I can request credits for any FVFs.