Not all public repositories, all active public repositories. The homepage[0] clarifies that this means "every repo with any commits between the announcement at

Not all public repositories, all active public repositories. The homepage[0] clarifies that this means "every repo with any commits between the announcement at GitHub Universe on November 13th and 02/02/2020, every repo with at least 1 star and any commits from the year before the snapshot (02/03/2019 - 02/02/2020), and every repo with at least 250 stars" [0] https://archiveprogram.github.com/ https://archiveprogram.github.com/