I believe it will eventually be shown that there are no "intelligence agencies" and never was. There is "an" intelligence agency, and it has branch offices around the world, masquerading as entities that are part of the various governments.
This is the same model that was being implemented for the governments themselves: Actually only one government, but people could "vote" and so thought they had a voice or role in their country's government, or as they have come to call it: "democracy."
I think we may see come spilling out of twitter, the truth that one central entity has controlled across all platforms, in a similar "governance" model, and that it is tied to the intelligence arm of the big machine.