Yes - happy to share codes with anyone. Also, we will be simplifying the invite system in the next few days so that JuliaBox will let you in without any code by default.
In the rare cases of a surge, such as an HN mention, it will auto-release account approvals as the surge subsides in a few hours. Once you do have access, you will continue to have access, even during surges. Basically, we are just trying to manage our compute budget better.