Edit: the exact link to the official warrant canary is specified in the top post, please don't answer if you haven't recognized that much:
https://riseup.net/pl/about-us/canary
The "If they're relying on double entendres then it might as well be" as a response to "A Twitter feed is not a warrant canary" really has no sense.
https://en.wikipedia.org/wiki/Warrant_canary
Also worth reading:
https://www.schneier.com/blog/archives/2015/03/australia_out...
This could just be drama.
I don't particularly think Riseup is in that position, but unless someone actively says "don't worry about our lack of a canary, we took it down for $REASONS and all is well", negative evidence is all you can react to.
"Dear friends, please remember that internet is not always the answer..."
"by the way, that wasn't a trump related tweet..."
"listen to the hummingbird, whose wings you cannot see, listen to the hummingbird, don't listen to me. #LeonardCohen"
It all "has nothing to do with" canaries.