I think that if there were any type of information about spying on Bitcoin, then Edward Snowden would've exposed that in his intelligence leaks.
Snowden's just one guy. There are plenty of layers higher than him. Anyway what need is there to 'spy' on Bitcoin? All the info you desire is readily accessible everywhere.
Good question! But, why did they need to interview Gavin if they had all the information they desired anyway...I mean, Satoshi went dark right around that same time so....Hmmmm.
In the "hood," what Gavin did wouldn't fly!