https://arstechnica.com/tech-policy/2023/01/twitter-retroactively-changes-developer-agreement-to-ban-third-party-clients/

"Long-standing" can apparently mean "tomorrow" at Elon Musk's Twitter, as the company has changed its developer agreement to seemingly justify its banning of third-party clients. The change happened two days after a vague tweet about "enforcing long-standing API rules" without pointing to any.

As noted by Internet sage Andy Baio, a text comparison (diff check) of Twitter's developer agreement between the effective dates of October 10, 2022, and January 19, 2023, shows only one change besides the effective date: a new line added to the section "Restrictions on Use of Licensed Materials." The addition restricts the ability of developers to: