Back in May, OpenAI said it was developing a tool to let creators specify how they want their works to be included in — or excluded from — its AI training data. But 7 months later, this feature has yet to see the light of day. Called Media Manager, the tool would “identify copyrighted text, images, audio, and video,” OpenAI said at the time, to reflect creators’ preferences “across multiple sources.” It was intended to stave off some of the company’s fiercest critics, and potentially shield Open...