These type of repositories have existed since the first Hacktoberfest. They might even be useful for beginners to learn how to prepare their first pull request. But the idea of Hacktoberfest is clearly not to submit all your pull requests to such a repository.
It even seems as though DigitalOcean is blocking these type of repositories. From the FAQ:
My pull request is marked as being on an excluded repository. What does this mean?
Unfortunately, your pull request was made on a repository that doesn’t align with the core values of Hacktoberfest. We’ve decided that pull requests made to this repository will not count toward completing the challenge.
It even seems as though DigitalOcean is blocking these type of repositories. From the FAQ:
My pull request is marked as being on an excluded repository. What does this mean?
Unfortunately, your pull request was made on a repository that doesn’t align with the core values of Hacktoberfest. We’ve decided that pull requests made to this repository will not count toward completing the challenge.