Illustration: Shoshana Gordon/AxiosForbes sent a letter to the CEO of AI search startup Perplexity accusing the company of stealing text and images in a "willful infringement" of Forbes' copyright rights, according to a copy of the letter obtained by Axios. Why it matters: Publishers fighting to protect their intellectual property are stuck in a game of whack-a-mole as they confront not just the biggest AI companies, like OpenAI or Google, but also smaller AI startups.Catch up quick: Forbes gene...