https://www.reuters.com/article/us-facebook-privacy-cambridge-analytica/researcher-in-facebook-scandal-says-my-work-was-no-good-for-targeted-advertising-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 that the work he did was not useful for micro-targeted adverts.