After 180 days your e-mails on servers of the American post providers become the property of the USA.
According to Wikipedia "Email that is stored on a third party's server for more than 180 days is considered by the law to be abandoned. All that is required to obtain the content of the emails by a law enforcement agency is a written statement certifying that the information is relevant to an investigation, without judicial review"
Can the team provide sources for what they claim? Because I cannot find anything related to this affirmation, and it's the only one that I have double checked so far because it seemed unlikely to me.
On a more personal note, I am actually quite happy that whistleblowers can access emails, and presenting Edward Snowden as a cybercriminal is quite laughable if you ask me.
I also find it interesting that each member of the team has 4 Linkedin connections, when the team is made out of 5 people. Looks like someone created fake profiles and added each member of the team.
But again, I can be wrong.
You quite right found the law on 180 days, but you did not study it and only took the quote from Wikipedia.
We studied a question very carefully and here a small part of articles by which were guided when wrote WHITE PAPER:
Please study these articles and the law in more detail and you will understand why we so interpreted this law!!!