Startups that are closing down are selling off their company data, including emails and Slack messages, for up to hundreds of thousands of dollars to train AI models. These data is often used in "reinforcement learning gyms" or "realistic environments" where AI agents can practice workplace tasks. This type of data has become very lucrative, with companies that handle payroll, taxes, and investor settlements becoming more involved. However, privacy advocates have raised concerns about the potential implications for workers whose data may be included in these datasets.