"In 2015 few people, including Trump, believed that he could be elected President. A team within Facebook spotted an opportunity & worked with the Trump team on an advertising strategy & then targeting political messages at very specific groups of people. They strengthened support from some & discouraged others from voting. For Facebook, what mattered was growing the clicks. The impact on the rest of the world was something else"
https://eastangliabylines.co.uk/technology/clicks-at-any-price-the-corruption-of-facebook/