PlayingViral founders Steven Wongsoredjo and Michael Rendy Millennials have been accused of possessing shorter attention spans than goldfish. Though that claim is questionable, online marketers know display ads and even sponsored content are no longer enough to attract twentysomethings. PlayingViral gives brands a new way to lure young consumers with embeddable surveys and quizzes that use machine-learning algorithms to reach the right audiences. The second Indonesian company accepted into Y Combinator (after bill payment platform Payfazz), PlayingViral finished the accelerator program last month and is now getting ready to expand in the United States, Canada, Brazil and other markets. PlayingViral is part of Nusantara Technology, a tech and media group that develops marketing tools for clients, including Proctor & Gamble, that want to reach young Indonesians.