It's the same lesson as the Navier-Stokes credit fight earlier this month. Buckmaster and Alpoge had their unpublished drafts in private Codex sessions and OpenAI says nobody saw them but admits de-identified product data may have improved its models. There it's training data, here it's ad trackers. Either way, prompts and results that should stay private don't. Thats why even though open models aren't perfect it has to win. You can skip the app and run the model yourself.