What do you mean? There is a website called Docker Hub. There is a competing product, affiliated with Podman, called Quay, which is also a website and an on-prem solution that I think you can pay for and also an open-source product:

https://github.com/quay/quay

> There is a competing product, affiliated with Podman, called Quay

Most stuff is not published on Quay; most podman users use Docker Hub or Compose files.

> Most stuff is not published on Quay; most podman users use Docker Hub

or GHCR, etc. Docker Hub is hardly a “runtime”.

> or Compose files.

Compose files aren’t a replacement for Docker Hub. And Podman has a reimplementation of compose.

> Docker Hub is hardly a “runtime”.

In the context of your question Hub makes sense, as it is something Docker maintains that most podman users still rely on

> Compose files aren’t a replacement for Docker Hub.

Correct, but most compose files refer to Docker Hub.

You seem to be highlighting that alternatives, which I don't dispute, but most people are overwhelmingly using the services that Docker maintain. That's the answer to your question. Read up a few replies if you've forgotten the context.