It's because those sites had a lot of pornography which attracted men. It's crazy how a bunch of 2's can draw so many men. Just like videogames, if men go, women will follow, and when women follow, they demand attention, so do attention seeking behavior. Once women start getting entrenched it naturally draws men like moths to a flame, and women being the authority craving bad girls who like getting spanked, go right along with it. They cave to the demands of the most narcissitic on the platform. Snapchat, and all that shit keeps face book relevant mostly because of the porn, same goes for reddit.