Screen shot is from The Knot. TK would rotate them either every X minutes, or every refresh - can't remember which... but is additional visibility within the marketplace.

We would mention it in the demos along the lines of 'We have other ways to drive more visibility such as banner ads, or social media posts as add ons to your partnership at any time' etc. Partners loved it over there... so thought I'd share.

(Not from user, from me)