PARIS: The introduction of advertisements and sponsored content in chatbots has spawned privacy concerns for AI users as brands scramble to stay relevant in a fast-changing online environment. ChatGPT developer OpenAI began showing ads in chatbot conversations for free and low-cost users to start balancing its hundreds of billions in spending commitments with new revenue sources. It swiftly came in for mockery from rival Anthropic, which has staked its reputation on safety and data security.