EBay seems to have announced the promotion generally, but only invited select sellers to participate.
With luck that means the dropshippers and the entire continent of Asia will not be getting free listings.
Promotions are for eBay's benefit, not ours.
EBay seems to have been using promotions to encourage occasional sellers to list more. If this also leads to more sales (which a site-wide promotion would not) then the books look good as eBay comes up on Q3.
If you are a steady seller, or have a Store or are a TRS, you are already doing all you can for eBay's bottom line. If you are an occasional seller (or have a high FB buying ID) you may be invited.