Ticketmaster didn’t come to rule an industry by suffering interlopers. Over the past 30 years, the company has killed or eaten nearly every competitor: Ticketron, TicketWeb, TicketsNow, Paciolan, and Musictoday. And a potent combination of top artists, venues, and long-term ticketing deals makes Ticketmaster one Goliath well positioned to crush a whole army of Davids.