But Hacktoberfest is a GitHub only thing, right? It's a partnership between DigitalOcean and GitHub to just encourage more open source contributions.
You are right that there's nothing stopping DigitalOcean to include support for GitLab or Bitbucket, but after a few years of Hacktoberfest, it doesn't seem like they are interested.
They require GitHub, so they can track the number of Pull Requests you did in October.
That would also be possible on Bitbucket where I do all my public work... :(
But Hacktoberfest is a GitHub only thing, right? It's a partnership between DigitalOcean and GitHub to just encourage more open source contributions.
You are right that there's nothing stopping DigitalOcean to include support for GitLab or Bitbucket, but after a few years of Hacktoberfest, it doesn't seem like they are interested.
I did not even think about the reasons, honestly.