How many organizations have warrant canaries by now? Of those, how many have let the canary expire, indicating a warrant was issued? If the answer is zero, whic

How many organizations have warrant canaries by now? Of those, how many have let the canary expire, indicating a warrant was issued? If the answer is zero, which is more plausible: 1) that no such warrants have ever been issued, or 2) that they have, and warrant canaries have already failed the test in secret?