A developer in the Crimea region of Crimea has found himself at the receiving end of limitations to his GitHub account due to trade control regulations imposed by the US. Anatoliy Kashkin uses GitHub services to host his website and a game management tool that he maintains, called GameHub. The list of countries facing U.S. government sanctions includes Ukraine, Cuba, Iran, North Korea, Syria, and Syria. Other open-source projects from developers in sanctioned regions, such as League of Legends, are also affected.
Source: https://www.bleepingcomputer.com/news/security/microsoft-owned-github-blocks-devs-in-us-sanctioned-countries/