What seemed like a parlour trick became the hook for Stephen O’Leary’s Olytico to land its most important client – a Fortune 500 pharmaceutical company that now accounts for a quarter of the company’s turnover. O’Leary, who started life as a journalist with the Irish Examiner, founded Olytico, a social listening and social media monitoring company, 14 years ago. Prior to the pandemic, he was invited to speak in front of a group of business executives about his company. Seeing an opportunity for some showmanship, O’Leary studied the guest list before and used the company’s tools to surprise those whose…