Some context here is that our launch is mainly to developers. Other users can't even sign up from the website or use the product without self-hosting. In any case, we'd still need to post a link to Github, somewhere.

If you're saying it's ok to post a Github link to a non-open source project, but just not as the main URL, I'd understand, but I still feel that in our specific case, the Github link is the least friction path to set up for self-hosting. I think a developer who goes to a marketing site and doesn't easily find way to setup/self-host would be more frustrated.