[passwd]

I'm assuming it would be easier having one IPv6 address used only by a single application, that's why. Amazon/Google services would be less affected then. There's a whole different question if government would bother to be that precise, still.

[jandrese]

The whole point of moving to the cloud was to make themselves harder to block. I don't think they would self-defeat by limiting themselves to a single /64 or something.