I am not denying that tickets are expensive, because when I checked these prices and saw how high they were, my first thought was "I can definitely skip this". However, as long as people are willing to pay top dollar, they know they don't have to do what Operation Mincemeat did, or what Maybe Happy Ending did, and discount/lotto off the tickets for their first few weeks of performances. They know the names alone will sell tickets, no matter the price.