How Facebook's Poke App Could Be Its Next Mobile Cash Cow

For all its focus on finding new revenue streams, Facebook is concentrating on mobile and ensuring that it's still relevant when its users migrate there for good. After testing out sponsored stories, app downloads, offers, and promoting your posts for a price, it's always looking at different ways to increase revenue. With the aim to make mobile just as profitable as desktop, if not more, Facebook has a number of options to experiment with, Instagram being the obvious one, but none that has more...