Excerpt from this article:
Microsoft will know what’s going on with Facebook before Zuckerberg does; it’ll know what skills are being added to Googlers’ resumes; it’ll know what kind of searches HR departments are doing across the world, and it can use that information to start marketing its own services to those companies. It can use LinkedIn as a global knowledge base to make more informed, long-term decisions about its own role in the global economy, and it can combine that information with what it learns from other platforms like Windows, Office 365, Bing, XBox, and so forth. It can answer questions like, “are employees of Google playing more XBox or less compared to last year?” It’s…terrifying. And we’ll never really know what’s going on. Which makes it kind of brilliant. But still terrifying.