How did this happen? Silently and behind the scenes without much fuss.
The digital economy is a never-before-seen milestone of human civilization. Naturally, majority of people are unaware of the value of their data, how their data is used, and that online corporations routinely exploit their data.
The name of the game is to harvest your data, unless you say otherwise. And until the implementation of GDPR, an opt-out was not possible or extremely difficult to find. Combine that with the general public unawareness of datamining, and you can see how the playing field is rigged against everyday people.