I do wonder how much of this "insight" is even the AI's own work. The fact that they rush this out to the press makes me think they know they'll have the actual researchers "steal" their thunder with a real research paper.
If it's true that they don't know how much of the training data contribution came from which user, they also have a weird race-condition on each result, where they don't know how distributed the contributed data actually is across users.
This means on each AI result they don't know how close an individual researcher already is to the same conclusion, so they need to rush to a press-release before some human devalues their (multi-million) compute-investment...