In fact, he may have even said it on Cryptocat; Poitras and Greenwald used it to collaborate with him. Snowden also used Lavabit to send email. Why? Because Lavabit had superior UX to his other options --- because Lavabit handled all the crypto serverside. NSA has presumably read everything he sent on both of those systems. Despite the extreme ease of use both systems boasted, they were both so badly designed that they enabled <i>retroactive decryption</i>.<p>So I think, if that was an attempt at a rebuttal, it was not a very effective one.