I'd generalize a bit and say that a lot of the Hacktoberfest spam PRs were limited to adding non-informational content to README files -- adding adjectives like

I'd generalize a bit and say that a lot of the Hacktoberfest spam PRs were limited to adding non-informational content to README files -- adding adjectives like "great" or "awesome", or phrases like "we hope you enjoy it" or "have a nice day", etc. Nothing that actually demonstrated any familiarity with the project or an intent to improve it, let alone anything that actually touched the code of the project.