Interesting.
Lava Bit was a co-conspirator with Snowden. They refused a search warrant.
This is not how it was presented on this thread as some random fellow being told to give up all encryption keys to all accounts as SOP.
On August 8, 2013, Lavabit suspended its operations, and the email service log-in page was replaced by a message from the owner and operator Ladar Levison. The New Yorker suggested that the suspension might be related to the National Security Agency’s "domestic-surveillance practices". Wired speculated that Levison was fighting a warrant or national security letter seeking customer information under extraordinary circumstances, as Lavabit had complied with at least one routine search warrant in the past. Levison stated in an interview that he has responded to "at least two dozen subpoenas" over the lifetime of the service. He hinted that the objectionable request was for "information about all the users" of Lavabit.
Levison explained he was under gag order and that he was legally unable to explain to the public why he ended the service...
The refusal was to an illegal demand for a tap on all e-mail users, not to a lawful warrant (the service routinely cooperated with the latter).