Not really my area of expertise, but it strikes me as completely clear.
The canary hasn't been updated and the tweet implicitly acknowledges that they are aware of the concerns that people have about the overdue update. I can only think of two reasons to do this. 1. get some publicity or 2. for whatever reason they are unable to update the canary and are unable to say why. Personally, I doubt it's reason 1.
But why say they have no plans to shut down and link directly to the part of their FAQ where they say they will shut down if they are under government surveillance? Why not just tweet something like "We have heard your concerns" or something similar
The purpose of the hyperbole, I'd assume, is to make one ask the same questions you're asking. In the philosophical sense: if we have to ask, we already have our answer.
The canary hasn't been updated and the tweet implicitly acknowledges that they are aware of the concerns that people have about the overdue update. I can only think of two reasons to do this. 1. get some publicity or 2. for whatever reason they are unable to update the canary and are unable to say why. Personally, I doubt it's reason 1.