Earlier quoted context omitted.
He cooperated with warrants targeted at specific suspects. That's rather normal. He refused to cooperate with request to give them access to all users. They couldn't possibly have such warrant by considering them all suspects at once. They just told him, hand us over the keys or else. I'm not aware that he refused a targeted warrant on Snowden alone specifically. Or may be I missed that being reported somewhere.
Not somewhere, pretty much everywhere. http://www.newyorker.com/online/blogs/elements/2013/10/how-l... I think your idea of how the case developed is fairly inaccurate.
> The order, issued under the Stored Communications Act, required Lavabit to turn over to the F.B.I. retrospective information about one account, widely presumed to be that of Snowden.