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
@JonathanMosen @andybaio Agree with all this, don't know if I'll stick around on twitter when twblue quits working or not, I frankly find this Mastodon a bit of a pain in the ass and a bit complex to deal with, it is going to be much harder to teach to students than twitter is but this really pisses me off and once you get it working with a third party client Mastodon isn't bad.
@PaganLord116 That’s interesting. I find that people are a bit daunted by choosing an instance, but really that’s not much different from choosing an email provider. Once you’re over that hurdle it seems about the same difficulty level as Twitter.
@JonathanMosen Yeah Jonathan that is the biggest problem my students have is figuring out this whole instance thing, having to look through them and find one they are interested in and they agree to the rules of etc. Using a client definitely does make this service somewhat easier after that.