>> "we were able to form a model to predict the personality of every single adult in the United States of America."

That would be dystopian if it weren't so ridiculous. They can do nothing of the sort- predict the personality of any adult in the USA. At best they might be able to make predictions on a population basis, but anything more precise than that is out of the question. Behaviour prediction on an individual scale is pure, unadulterated fantasy.

This is just typical overselling of a service, by people who can use maths to obfuscate the fact that they 're making it up as they go along, targeted to people who wouldn't understand the maths if a five-year old explained it to them anyway.