Twitter quietly changed its Developer Agreement today to retroactively justify their unannounced ban on third-party Twitter clients. They added a single line forbidding "use or access the Licensed Materials to create or attempt to create a substitute or similar service or product to the Twitter Applications." Here's a diff between the two. https://www.diffchecker.com/DmAjUJGK/
Twitter TOS Change - Diff Checker

Twitter TOS Change - Developer Agreement Effective: October 10, 2022 This Twitter Developer Agreement (“Agreement”) is m

An absolute kick in the teeth to all the indie devs who worked so hard to make Twitter a better experience for so many. Twitterrific was officially discontinued today and pulled off the App Store after 16 years of development. Among other firsts, they first used "tweet" to describe an update, first used a bird icon, and were the first native client on iPhone and Mac. https://blog.iconfactory.com/2023/01/twitterrific-end-of-an-era/
Twitterrific: End of an Era • The Breakroom

Twitterrific has been discontinued. A sentence that none of us wanted to write, but have long felt would need to be written someday. We didn’t expect to be writing it so soon, though, and certainly not without having had time to notify you that it was coming. We are sorry to say that the app’s […]

Iconfactory Blog
@andybaio I read the article and I thought "stop crying and playing the victim, and modify the code to work with Mastodon." I invested thousands of hours in Twitter as a user, and I'm pissed off about the new owner and his idiotic behaviour but I move on despite losing touch with the community. That's life. Having a 16 year run is excellent in my eyes. On the web we usually move around within three to five years, not sweet sixteen. ;-) (sound of music joke/allusion). At the same time they could start a lawsuit against twitter to get them to give them back the required permissions. I think twitter is undermining its own value by its actions.