Jack Dorsey Chairman after Dick Costolo replaced Williams as the CEO. On June 10, 2015, Costolo announced that he was resigning as CEO of Twitter, effective July 1, 2015. Dorsey would assume the post of Interim CEO upon Costolo's departure. He was named permanent CEO of Twitter on October 5, 2015. On the day after the controversy about Twitter's new algorithms for tweets, Dorsey responded to the trend, saying it was only a hoax. In May 2016, Dorsey announced that Twitter would not count photos and links in the 140-character limit to free up more space for text. This move was an
Nick Bilton days and its four founders—Evan Williams, Jack Dorsey, Noah Glass, and Biz Stone—who are portrayed as "mediocrities, narcissists and mopers who seem to spend as much time on scheming, self-promotion and self-destruction as on anything else", according to Tim Wu's review in the "Washington Post". It was on the "New York Times" bestseller list and was voted Best Book of the Year on "The Wall Street Journal" Reader's Choice. The book was optioned by Lionsgate and is currently being turned into a TV series. Published in May 2017, Bilton's most recent book, "American Kingpin", tells the story of the Silk