Your ad sits at the bottom of a publisher's email as a banner or a text link under the main content. The Prairie Homestead sells it as an email subscriber banner link.
How it's sold
You book it with the publisher directly, as there is just one publisher selling it so far. It usually runs across the sends in a set period.
What it costs
Most publishers quote this on request, so ask for a rate card before you plan a budget. Footer ads are usually quoted per send or per month.
What you supply
You supply a banner image sized to the email width and a link, or a short line of text.
Best for
It suits steady brand awareness at a modest budget.
Before you buy
Ask for the typical open rate and click rate, because readers often skip the footer.