I'm trying to follow the instructions for Creating Sharable Links for a preview deployment in a Hobby plan. I created the deployment via Vercel CLI.
I follow the instructions through step 3 "Click Share button". It says to, and has a screenshot of, selecting "Anyone with the link".
However, when I try to do that, "Anyone with the link" is grayed out and has an "Upgrade" button next to it. When I hover it, a popup says:
To allow external collaborators to comment on the Hobby plan, the repository aws-js-sdk visibility must be public.

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I created the deployment via CLI, so I don't know what GitHub has to do with anything.
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I doubly don't know what that repository has to do with anything because even if I had deployed from a GitHub repository, it wouldn't have been that.
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If I had to deploy from a public GitHub repository in order to create a sharable link, that would totally not work for my use case and defeat the purpose of being able to create a sharable link.
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I don't want anyone commenting on anything, I just want a sharable link to the deployment.
In the screenshot in the instructions it says:
Anyone with the link can view Visitors must be logged in to comment
That sounds like it might be what I want.
After that, I found that on the project "Overview" page in the "Active Branches" section there's a single item. In that single item the "Source" button links to a fork of the aws-sdk-js repo in my GitHub account. I never setup any association between my Vercel account and GitHub, so I don't know how it made the connection to which GitHub account is mine, or why it thinks that random repository has anything to do with anything.
Is there actually a way to do this?

