Around the world, more than 2.3 billion people are on Facebook, actively communicating and posting and consuming on the platform, a figure that continues to grow and drive record profits, despite a barrage of privacy scandals and heightened scrutiny from U.S. lawmakers. Masses of people are not abandoning Facebook, according to the company's fourth quarter earnings, released on Wednesday. In fact, the company has reversed a troubling trend in its most important market: Facebook added users in North America for the first time all year.