Barstool Sports, to put it mildly, is not for everyone. It’s content veers decidedly in the frat-house direction, features a section devoted to scantily clad girls, venerates all things Boston and holds that anything and everything can be a source of amusement. But it is also a media brand with something more valuable than ever: loyalty. CEO Erika Nardini joined the Digiday Podcast to explain why the company’s close ties to its users allows it to have a diverse business model that relies on advertising for just half its revenue. "Advertising will be about 50 percent of our revenue, maybe less. It’s a great thing," she said.