It's a promise they really can't keep.

That's because it's a lie. It's like the lawyers (and everyone else here) forgot the Snowden leaks occurred.

I'm still confused if the Snowden leaks meant that the NSA was cooperating with the companies listed, or had developed backdoors with the companies listed.

There were Google security engineers that seemed to be in the dark about the level of NSA engagement.

https://plus.google.com/+BrandonDowney/posts/SfYy8xbDWGG