“The porn that is most easily accessible is that which is most stimulating and interesting to the most active users,” Johnson said. But porn websites, Johnson told me, cater most to their paying customers, giving prime placement to their tastes. Most people don’t pay for porn-their viewing is underwritten by advertising. Because companies such as MindGeek “push what people pay for,” said Jennifer Johnson, a sociology professor at Virginia Commonwealth University who specializes in pornography, they might drive viewers toward more niche material.