If you were a Twitterrific or Tweetbot user, you should download the latest versions of those apps from the App Store and launch them. Here’s why: https://daringfireball.net/2023/03/tweetbot_and_twitterrific_face_the_cliff
Tweetbot and Twitterrific Face the Cliff

There is something noble about two longtime rivals — competitors, yes, but with nothing but deep respect and camaraderie for each other — facing this terrible cliff together, with dignity and grace, considering their users first, as ever.

Daring Fireball

@siracusa I think it’s worth mentioning that you need to do this even if you let your subscription expire last month.

I let mine expire when I bought Ivory and thought I didn’t need to do this… but it still prompted me to decline.