ChatGPT is one of the most successful tech products ever launched. And crucial to that success is a group of largely unknown data workers in Kenya. By reviewing disturbing, grotesque content, often for wages of just two to three dollars an hour, they helped make the viral chatbot safe. WSJ’s Karen Hao traveled to Kenya to meet those workers and hear about what the job cost them.  Further Reading: - What Is ChatGPT? What to Know About the AI Chatbot  - The Contradictions of Sam Altman, AI Crusader  Further Listening: - The Company Behind ChatGPT  Learn more about your ad choices. Visit megaphone.fm/adchoices