I'm also thinking that Steemit could have that kind of reach, or more by the end of next year. I am not sure what are the technical challenges behind on-boarding that many new users but in another year it should be quite possible to achieve I guess, with the kind of resources available to develop the platform, improve the interface, and scale it. With P2P marketing and perhaps some guerrilla marketing, 2 million users seems within reach. Been actually working on accumulating some Steem whenever it went under $1...