As they should be! While I feel for both companies passing the buck to consumers that paid for a service they can no longer provide is a bad optic.
Perhaps both Tweetbot and Twitterific should have had better contracts/agreements with Twitter? If you base your business model on a rug that is that easily pulled out you kind of get what you deserve.
Edit: LOL @ all the "disagrees" not one of you has offered a reasonable explanation why consumers should foot the bill for a poorly planned/executed business model. They were happy to accept subscription money knowing full well this could happen. If they had API access contracts with Twitter, and based their subscription durations against these contracts, then this wouldn't have happened. Geez, lots of triggered fans of these two apps.
Edit 2: Still waiting for a rational response, that means one that doesn't start with "But teh Elon bad man!"
Musk just killed off these companies without notice. The "contracts" are just agreements that developers accept when they create a developer account. That is the only contract. It's not like you have your lawyer negotiate with Twitter.
Musk simply cut off these companies without even
changing the agreement. It took Twitter a week to update the agreement. See this Engadget article:
https://www.engadget.com/twitter-new-developer-terms-ban-third-party-clients-211247096.html.
From the article:
"Twitter previously said it was “enforcing long-standing API rules,” but hadn’t cited which rules developers were violating."
"But the company's suggestion that the rule was "longstanding" doesn't line up with its history. Twitter clients have long been a part of Twitter. Twitterrific, one of the most prominent apps affected by the API shut-off last week, was created before Twitter had a native iOS app of its own, and is
credited with coining the word “tweet,” as well as other features now commonly associated with Twitter’s app."
" In fact, Twitter previously changed its developer policies in 2021 to remove a section that
discouraged — but didn't prohibit — app makers from "replicating" its core service. The change was part of a
broader shift by Twitter
to improve its relationship with developers, including the makers of third-party clients. "
I think Twitterrific’s Sean Heber said it best:
“We are sorry to say that the app’s sudden and undignified demise is due to an unannounced and undocumented policy change by an increasingly capricious Twitter – a Twitter that we no longer recognize as trustworthy nor want to work with any longer.”