Hey folks,
We have already promised, in this thread (here: Is this project dead? - #44 by hillary) that we will not remove the code from GitHub nor change its license in a way to limit its use.
We have also already promised, also in this thread (here: Is this project dead? - #50 by hrishikesh) that we intend to keep the auxiliary services to allow you to continue to use our CMS (or others) on our service running for the foreseeable future.
Finally, we are aware and excited that community members have forked the CMS (see https://staticjscms.netlify.app/ for more details), and begun development on it once again, as you can tell from looking at the codebase for our CMS that maintenance is basically at a standstill: Commits · netlify/netlify-cms · GitHub
While Netlify is still considering the future of the codebase, and someone above my pay grade will come announce our future intentions someday in this thread (once they are decided), I think you can read between those lines that your best bet today would likely be to use the fork. This of course will come with the expectations of support that come with a package maintained by a third party with whom you have no financial relationship, so you have to decide if that works well for your business or not.