60-year-old Mark Herring was a tech guy. “He was so smart,” recalled Corinna Fitch, one of three daughters who says their father was always ahead of trends. “I think he joined Twitter the day or the week Twitter came about.” He grabbed a handle that reflected his love for the state where he was born and raised his family. “He just wanted to be @Tennessee because he loved the Vols,” said Fitch, with a slight smile. As Twitter grew, it was clear to all that Herring owned prime internet property. “He would just in passing say, I got another offer...