This B2B media company covers a $7.5 trillion industry and is profitable

John Yedinak didn't have a traditional journalism background when he started his media company. He was working in the mortgage industry when he read an interview with TechCrunch founder Michael Arrington. The interview inspired him to launch his own blog on the reverse mortgage industry, and as the blog's audience grew, he began to realize that there was a massive market out there for niche, B2B publications. In 2012, he officially launched the Aging Media Network, a constellation of sites that cover the businesses that service the aging population, from hospice care to senior housing. I recently sat down with Yedinak to talk about how his team built the audience for the publications, how they monetize the sites, and why they focus on advertising instead of paid subscriptions.