No, we don’t just mean in porn. Female users are the unsung heroines behind the most engaging, fastest growing, and most valuable consumer internet and e-commerce companies. Women dominate Facebook—over 600 million users. Twitter—25 billion tweets last year. Tumblr—1 billion page views a week. Zynga—100 million users on Cityville. Also they dominate Amazon, Zappos, Chegg’s, Popcap & Zynga.