Please, use some critical thinking here.

What information? The gov already had the phone number. They needed it to make the request.

Yes. That’s the leak. A phone number can bridge the gap between your messages and your identity.

Notice the lack of any usernames provided.

You literally changed what I said to fit your narrative. Should a government agency already have access to a message and username, and make a legally valid request for the phone number associated with that username, Signal will be required by law to provide it, as it’s already know and proven that they have access to it. The subpoena you provided shows that they already have the phone numbers, so it is moot to this point.

If they’re getting evidence outside of Signal, that’s outside the scope of this discussion.

No, it’s not, that was literally the point of the discussion to begin with, you are the one trying to change it.

…no. It can’t.

Do you not know how phone numbers work? Generally if you go through a reputable provider, you’re going to be required to give at least your name. Additionally, even if you don’t give them your address, your location can pretty easily be extrapolated from things like the area codes and areas in which the phone number has been used. A warrant/subpoena is all it would take, and since that phone number is already tied to any messages they may have, that ties them directly to your identity.

It’s proof that it doesn’t.

This one barely even warrants a response. You’re either being plain obtuse or are genuinely failing to think critically about this, so I’ll break it down for you. They wouldn’t be serving a warrant to or subpoenaing Signal if they didn’t know the accounts in question were involved in something, which at minimum strongly implies that they already have some evidence of these users’ use of the service. Additionally, the fact that they’re subpoenaing so many at once implies they were in some kind of group on Signal.

Let’s try a hypothetical. Let’s say we have downtrodden citizens A-F, who are using Signal to talk about Bad Government. Now, let’s say someone from BG joins their group undercover and records those messages. Well, now BG wants to punish those poor DCs. If the undercover bad guy already has their phone numbers, job done, they can go find them. If not, all BG has to do is make a legal request for those phone numbers as associated with the usernames, which they do have. That would leave Signal with the choice of complying and directly harming these individuals, or becoming effectively a criminal entity within this territory.

Now, as for you, you have deflected, misquoted, misrepresented, and employed willful ignorance in this debate, and I will broker no further time for bad actors. Goodbye.