They are, if you follow the threads they are apparently quite available through email and has responded to quite a number of people. Though probably not everyone, given the amount of email that they must be receiving right now.

If they have this unicorn superconducter. Then they have it next week, and next year.

And it's patented. There's no rush for them.

If they are faking, then there's still no rush.

maybe NDA, maybe trade secret. commercialization is a valid reason not to be all too chatty