See our interview with David Siegel David Siegel David Siegel is the former CEO of Meetup , Investopedia , and Seeking Alpha . He ’ s led these companies to 7X and 5X exits . He ’ s the author of the bestseller Decide and Conquer , a professor at Columbia , and a fellow alum of the University of Pennsylvania , Class of ’ 97 . Former CEO of Meetup , Investopedia , & Seeking Alpha