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
In case it’s not clear from this post https://daringfireball.net/2023/03/tweetbot_and_twitterrific_face_the_cliff the reason you’re being asked to tap a button that says you don’t want a refund on the remainder of your Twitterrific or Tweetbot subscription is that Apple WILL send you a refund if you don’t do this. You must explicitly opt out of receiving a refund.
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 thank you, it was not clear.
@siracusa it’s also not clear WHY Apple will do so, or an App Store rule that addresses this case.