Even if every exit node in the US is operated by private people or organizations, courts can compel the node owners to work with the government and not talk about it.
So if you're talking about "everyone in a giant group of people" and doing it routinely, existence of those secret subpoenas seem like they'd get leaked eventually. Especially if it's hard to tell which of the 300 people leaked it.
And knowing this, the jail time or personal life destruction that would almost inevitably occur isn’t worth it for almost anyone.
This seems obvious but it is a constitutional right that has been cited as a reason to not comply with extra-judicial pressure to assist the government with an investigation.
This is why some projects do not accept donations and have a canary.
Had the authors of Truecrypt been paid, they could had been compelled to modify their source code to the government's will.
By not accepting payment, they are protecting themselves.
but they can force people to work with pay https://www.wbay.com/2022/01/20/thedacare-seeks-court-order-...
Ahem... "terrorism!"
Poof! Now your Constitutional rights no longer exist.
No, because the police will tell you to not tell anyone about the court order. If you do so (for example using a warrant canary), you will be in big trouble. Those canaries were always a convenient fiction, almost to the point of it being entirely in question whether or not this fiction was created in good faith.
( https://www.eff.org/deeplinks/2014/04/warrant-canary-faq )
Your life quality will take a sharp negative dive if you don't conform to the spirit of what they ask you. Whether or not such things are legal really is immaterial: You will be in trouble anyway. As such, I dislike advice that leans on what the law says.
Which can mean "no company has tried" or "no TLA has tried".
If the canary doesn't receive a signed message within X amount of days, the canary sings.
Nobody can force someone to do work or self-incriminate.
Seems like a catch 22 that it's a lose-lose.