404 Media tested and revealed how ChatGPT uses prompts, phone numbers, and email addresses to target ads.

Through its own test of running ads on ChatGPT, 404 Media found that OpenAI allows advertisers to target users based on their email, phone number, Android ad ID, and the prompts they input. Targeted lists must contain more than 25,000 entries to be used for targeting. OpenAI states that uploaded files are typically deleted within 24 hours. Users can opt out of ad personalization, but ads and tracking will not stop completely.