Got this email overnight from OpenAI:

We’re updating our Privacy Policy to include information about ads in ChatGPT, including how they work and how you can control your experience.

Ads may appear on Free and Go plans. Plus, Pro, Enterprise, Business and Education plans do not have ads. Ads do not influence the answers ChatGPT gives you. When you see an ad, they are always clearly labeled as sponsored and visually separated from the organic answer. We’ll ask you to make a choice about personalised ads when they launch, and you can manage ad personalisation anytime in settings. If you choose personalised ads, you’ll get relevant ads using information that stays only on ChatGPT, such as ads you've interacted with, or context from your chats.

Your personal details and conversations with ChatGPT are private and are not shared with advertisers. Advertisers do not have access to your chats, chat history, memories, or personal details. Advertisers only receive overall information about how their ads perform, such as total views or clicks.

Learn more about ads in ChatGPT and our privacy controls, including how we protect your data.

Thanks, The OpenAI Team