[bdcravens]

As I mentioned in another comment, perhaps you could invite current users to a private repo, and then make it public at the business EOL.

[sneak]

If it’s open source, a private repo is not protection. Free software licenses allow for unlimited redistribution.

[TheGeminon]

You don’t need to apply the license until after the public release, before then it would just be sharing code with your customers under whatever agreement you want