s still being built in public. ChatGPT now reaches roughly900 million weekly active users, and OpenAI s a massive amount of buying-decision traffic sitting inside a channel most eCommerce brands haven beneath a ChatGPT response, after the model finishes answering, never inside it. OpenAI calls this : paid placements are never supposed to bias the AI s gone. As of May 5, 2026 , any eligible US business can run ChatGPT ads through OpenAI