Crazy to think I was there live when this got leaked. For context: A person on Famiboards (a tech-focused Nintendo forum) was combing through the FTC v. Microsoft case files for potential Switch 2 information, and noticed that some of the pages had an unusually large filesize for simple PDFs. Another user told them that PDFs can have attachments and that Firefox can view PDF attachments, which is where all of these emails were. Some rando noticing "hey, these files are really big" to accidental corporate espionage pipeline.