Say we assume that all users have the same economic value to Facebook (an extremely unlikely assumption; it's most likely that the first billion have much more discretionary income than the rest). Assuming Facebook gets the remaining 5.9 billion humans (including all those without Internet), they will only be able to increase their userbase by 7.5X.
Assuming the world 'wants' businesses to have a P/E ratio of around ~15, Facebook either believes in the two above totally fallacious assumptions (they don't), or they anticipate rolling out new revenue strategies to create value.
Say we assume that all users have the same economic value to Facebook (an extremely unlikely assumption; it's most likely that the first billion have much more discretionary income than the rest). Assuming Facebook gets the remaining 5.9 billion humans (including all those without Internet), they will only be able to increase their userbase by 7.5X.
Assuming the world 'wants' businesses to have a P/E ratio of around ~15, Facebook either believes in the two above totally fallacious assumptions (they don't), or they anticipate rolling out new revenue strategies to create value.