Open ChatGPT in Europe on Monday and, if you’re on the free plan, you may notice something new sitting near the answers: an advertisement. As of 24 August, OpenAI is switching on ChatGPT Ads across 31 European markets — the company’s biggest advertising expansion yet — six months after it began quietly testing the idea in the United States. Free and Go users are in; anyone paying for Plus, Pro or Enterprise is not. Answer first, because the shape of this matters more than the noise. This is t...