It might be just the matter of time. He already said told us all the surveillance news he could. Now, with no access to additional secret knowledge, he's just a regular privacy activist - and the only way to get previous levels of media exposure is to say something controversial.
Some secrets are hidden in plain sight. They're there, but because most people get information from news outlets, and they don't cover these topics, it's like public information becomes a secret, buried underneath a mountain of noise.
