Gitflow and TBD are just two of the many possible ways to use Git. Several companies (such as yours) use other systems that have no name. And that is fine. We don't need to name every possible variation of a Git model.
If it doesn't have a name, I might give it one and document it more formally than in a hacker news comment. I was under the impression that most teams implement one of a handful of standard models. But it's possible that you're right that there's more variation to it than I thought.