OpenAI signs deals with Magnite and PubMatic to fill ChatGPT ad space

The ChatGPT maker is bringing in two independent ad-tech platforms to sell its unused ad inventory as its ad business scales OpenAI has signed deals with ad-tech companies Magnite and PubMatic to fill unsold advertising space inside ChatGPT. The company that once treated ads as a last resort is now building a full ad-selling machine. Magnite and PubMatic are sell-side platforms, usually called SSPs. Think of them as auction houses for ad space. A publisher hands over its available slots, and the SSP runs automated auctions where advertisers bid in real time. That automated buying and selling is called programmatic advertising. Nobody negotiates each ad placement by hand. Software does the matching in milliseconds. Under these partnerships, the two companies will handle what the industry calls remnant inventory. That is the ad space a publisher hasn’t sold through its direct deals. The financial terms of the partnerships were not disclosed. So it is unclear how revenue will be split, or how much of ChatGPT’s inventory will flow through these channels. Both companies are independent SSPs that compete with Google’s AdX, the ad exchange run by the biggest name in digital advertising. B...