At first, nostr:npub1un5jucy06e3pe8gpfy0t2n3qlpwrr90nx7xm6wrdfumguzv9nh7sxa7hjp will have only “asks” in the marketplace: advertisers will post an order (text, media, scheduled time to broadcast, reward) to the order book, and posters will accept.
But I’m also thinking about “bids”, too. Sometimes, influencers can come up with an ad that is better, more creative, more in the moment. Why not offer it to the advertiser?
Not sure of the mechanics though, it’s just an idea for now.