Then we should definitely consider DDG, a much smaller company in the same country, sharing its keys with NSA. They too might be under some gag order that not only stops them from saying that they are compromised but also gagged to say that their users are anonymous so that all the terrorists, law breakers and cheating husbands use this service because of a false sense of security. It is not beyond the realm of possibility.
But everything that is plausible is not probable.