I think you misunderstood the article. This is not about running a private registry. Running a public registry (e.g. for an open-source project) exposes you to

I think you misunderstood the article. This is not about running a private registry. Running a public registry (e.g. for an open-source project) exposes you to bandwidth costs and such. The solution in the article allows such projects to use their own domain without incurring any of the maintenance burden of running a public registry. One of the problems for open-source projects currently is that any move (even to another provider) causes a lot of disruption, because all users of the project need to update the address they pull from. This solves that.