Marketers Join OpenAI's Ad Pilot as It Reaches $100M

Reuters and CNBC report that OpenAI's US ads pilot reached an annualized revenue run rate of $100 million within six weeks, a figure Reuters attributes to a company spokesperson and which CNBC says was first reported by The Information (Reuters; CNBC). The Reuters piece also reported the pilot has grown to more than 600 advertisers and that OpenAI is preparing to introduce self-serve advertiser tools in April (Reuters). OpenAI's own blog post dated February 9, with an update on March 26, described early results as "encouraging," said ads do not change ChatGPT answers, and included a direct line that "we'll begin expanding beyond the U.S., starting with pilots in Canada, Australia, and New Zealand" (OpenAI blog).

Per OpenAI's published post and subsequent reporting, ChatGPT ads appear alongside generated answers, do not influence the model's responses, and will not be shown to users under 18 or next to certain sensitive topics such as health and politics (OpenAI blog; CNBC). Reuters and CNBC reported that roughly 85% of eligible free and Go users could see ads, though fewer than 20% are shown ads daily, leaving headroom for ad frequency growth inside the current user base (Reuters; CNBC).

Industry-pattern observations: early ad placements in conversational AI tend to mirror display-ad mechanics adapted for chat interfaces, which shifts measurement from traditional click-through metrics toward conversational engagement and downstream conversion tracking. Companies experimenting with ad inventory inside LLM-based experiences often face attribution gaps where multi-touch funnels and assisted-conversion models need modification to capture AI-mediated discovery.

the revenue milestone matters because it validates a monetization path for large consumer-facing LLM experiences, potentially altering vendor economics for free/low-cost tiers. Coverage emphasizes both demand-more than 600 advertisers expressed interest-and marketer behavior: Digiday quotes advertisers and agency execs saying participation is driven in part by FOMO, even as concrete ROI data is limited for early pilots (Digiday). Trade sources also reported some advertiser frustration at a cautious, slow rollout, which OpenAI described as intentional while it iterates on relevance and privacy safeguards (CNBC).

For practitioners: monitor these indicators to judge whether ChatGPT ads become a durable channel:

• •Advertiser performance data and standardized attribution signals emerging from OpenAI or independent measurement partners.
• •Uptake and feature set of the announced self-serve advertiser tools, which Reuters reported were slated for April (Reuters).
• •Expansion outcomes in Canada, Australia, and New Zealand after the March 26 update on OpenAI's blog (OpenAI blog).
• •User trust and privacy metrics over time; OpenAI and reporting say early signals show no impact on consumer trust but independent verification will matter (OpenAI blog; Reuters).

Reported figures show strong early advertiser demand and a rapid revenue run-rate milestone, but trade reporting frames many activations as exploratory and FOMO-driven rather than proven, repeatable ROI-generating campaigns. Observers and practitioners will be watching for measurement primitives and self-serve tooling that make the format operationally useful at scale.