Of course it's about adult sites. I find it strange that you cannot include them in any analysis about trends or UX or web developments for obvious reasons, but clearly porn sites are in probably the most competitive area of the web and therefore adapt to change quicker than any other industry. However, isn't it strange that a site with more than 500 million visits in December 2015 has an owner who is very, very hard to track down? But my text messages are saved, stored and analyzed by multiple agencies in a variety of countries?
Interesting piece about adult websites and how they mnage to hide their owners: