DeepSeek on Monday said it would temporarily limit user registrations "due to large-scale malicious attacks" on its services, though existing users will be able to log in as usual. The Chinese artificial intelligence startup has generated a lot of buzz in recent weeks as a fast-growing rival to OpenAI's ChatGPT, Google's Gemini and other leading AI tools. Earlier on Monday, DeepSeek took over rival OpenAI's coveted spot as the most-downloaded free app in the U.S. on Apple's App Store, dethroning...