That's only 3.3 Instagram's, one Snapchat, or .21 WhatsApp's. Solid proof consumer tech is always more profitable then enterprise tech.
Well, I say Microsoft makes more profit out of enterprise then Facebook makes out of consumer. Does this prove anything? Not at all.
i.e. if Instagram had a valuation of $800 million the $1 billion purchase price could make sense if Facebook believes their combination could produce the difference in price.