https://www.reuters.com/article/us-facebook-privacy-cambridge-analytica/researcher-in-facebook-scandal-says-my-work-was-worthless-to-cambridge-analytica-idUSKBN1HV17M >A researcher at the center of a scandal over the alleged misuse of the data of nearly 100 million Facebook users said on Tuesday the work he did was useless for the sort of targeted adverts that would be needed to sway an election.