You don't know how they sold it and they're certainly not trustworthy enough to believe them even if they say that's the way they did it. Until all companies t

You don't know how they sold it and they're certainly not trustworthy enough to believe them even if they say that's the way they did it. Until all companies that trade in user data are required to disclose how they do so by a regulatory body, and users have an access to an example "slice" of the data being traded, this will continue the way it does, because the incentives are there.