[ejones]

Yeah, the inclusion criteria are pretty broad:

  The snapshot will include 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.

from https://archiveprogram.github.com/#arctic-code-vault

[sdesol]

This would make sense, as it looks like money wasn't a huge factor. If money wasn't an issue, time and effort would be, and you can easily reduce effort by storing pretty much everything.