I don't think you should call something 'open source' until you've released the source, but other than that this is an extremely impressive project. HAM's have been doing EME since forever (https://en.wikipedia.org/wiki/Earth%E2%80%93Moon%E2%80%93Ear... ), it is a very neat trick.
It almost looks as if the EME bounce capability of this antenna is a fig leaf or an afterthought, my own 'applications' list would be a lot of things, but not that.
Apparently it’s a way to attract attention and support. I’ve been following picoIDE which got some attention here on HN 4 months ago [1]. When asked then where the src is, the answer was in a few weeks. Fast-forward a crowd-supply campaign (no mention 4 months ago) to the tune of 350k and the repo is still empty.
[1] https://news.ycombinator.com/item?id=45949352
It's open source. Here is the GitHub: https://github.com/open-space-sdr/main
That wasn't there when I wrote that comment.
found it at the very bottom of the updates page
the open-source licenses are listed at https://moonrf.com/updates/#faq