Twitter Co-founder and CEO Jack Dorsey unfollowed Facebook Co-founder and CEO Mark Zuckerberg's Twitter account, '@finkd'. Notably, Zuckerberg hasn't tweeted from the account since 2012 and has only 12 tweets in his account. Reports claimed that Dorsey made sure the world took note of the move by first following '@BigTechAlert', which updates on the following and unfollowing activities of CEOs.