Unlock the Editor’s Digest for freeRoula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter.OpenAI is discussing plans to introduce advertising to its artificial intelligence products, as the ChatGPT maker seeks new revenue sources as it restructures as a for-profit company.Sarah Friar, chief financial officer at OpenAI, told the Financial Times in an interview that the $150bn AI start-up was weighing up an ads model, adding that it planned to be “thoughtful about ...