Although OpenAI sells subscriptions to the service, most of ChatGPT’s more than 900m weekly users are on its free tier. Ads represent a way to monetise them https://www.economist.com/business/2026/04/19/why-your-ai-assistant-is-suddenly-selling-to-you?taid=69e74ab085041c000182d5ad&utm_campaign=trueanthem&utm_medium=social&utm_source=voante
