Twitter, known for instant and short-form expression, is investing more in the media business and long-form journalism. The company announced Tuesday it’s acquiring Scroll, a startup that offers ad-free viewing of news sites for a monthly fee.Twitter, known for instant and short-form expression, is investing more in the media business and long-form journalism. The company announced Tuesday it’s acquiring Scroll, a startup that offers ad-free viewing of news sites for a monthly fee.