OpenAI ad service can bill customers for up to one day after they pause campaigns

OpenAI appears to be serving ads after buyers have halted their campaigns, and charging them for the privilege.OpenAI began testing ad sales in ChatGPT in the US back in February and has been gradually expanding the service in other regions, including the United Kingdom, Mexico, Brazil, Japan, and South Korea as of Tuesday. Given that a substantial minority of ChatGPT user base pays for the service (50 million out of 900 million weekly users as of February 2026), advertising revenue appears to b