Twitter Kit 3 was introduced as a standalone SDK earlier this year. Originally limited to Android and iOS, Twitter has expanded support to Unity. Whether its login authorization, in-game Tweets, or sharing, Twitter Kit for Unity might change the gaming landscape through more social capability.
At the end of last year, LinkedIn announced major changes to its APIs and developer program. Those changes will soon take effect, and developers need to migrate accordingly by March 1. New developer program features, version 2 of its API, and the use of OAuth 2.0 will all be requirements on March 1.