So your rational is: since Facebook was already mining your conversation metadata, people shouldn't be leaving. Did I capture that accurately? Seems pretty flimsy. You're right though, people should have left a long time ago.
Pedantry aside, isn't it? In a thread about the backlash to whatsapp changes, Op said "it's not what you think it is!!!"
The point is, this happened to be a watershed moment. Whether the conditions (mining metadata) were met years ago or in a week or two from now is irrelevant.
