I certainly don't begrudge Docker for trying to create a sustainable business, but as an "open core" model it's really hard to understand what their proprietary extensions are that people will want to pay for. They took a stab at the container orchestration space with Docker Swarm (which you could definitely imagine having an "enterprise version") but that lost out pretty definitively to Kubernetes. So they're left with Docker Hub? That just doesn't seem like it will really be much of a revenue generator. You're either using whatever cloud container registry is available (ECR, GCR etc) or you're using a more general artifact repository like Artifactory, GitHub which can be a container registry as well as a Maven/NPM/etc artifact repository.