Isn't this already known for years? I might be wrong but feel like the whole thing with Cambridge Analytica was more about accurately influencing public opinion than it was about data being leaked.
This is kind of dumbing down the issue, but: anyone not well-versed in implications of privacy violations would feel way stronger when claiming "Mark Zuckerburg is partly responsible for Donald Trump becaming president" versus "Google, Facebook, Amazon, Apple and Microsoft have data which will make you more susceptible to spending slightly more money [...on something you don't actually need]"
This is kind of dumbing down the issue, but: anyone not well-versed in implications of privacy violations would feel way stronger when claiming "Mark Zuckerburg is partly responsible for Donald Trump becaming president" versus "Google, Facebook, Amazon, Apple and Microsoft have data which will make you more susceptible to spending slightly more money [...on something you don't actually need]"