Yet another Rust project sinking to the depths of closed source.
If you wouldn't mind reviewing https://news.ycombinator.com/newsguidelines.html and taking the intended spirit of the site more to heart, we'd be grateful.
No free or open source license requires private modifications to be shared. Doing so would violate your privacy, and goes against the 'you can use this software for any purpose' requirement.
> or [never] provide it as a service over a network to users, you don’t have to provide source.
Hell, AGPL is one of the few licenses that does require you to share modifications, if you provide it as a network service. Again: strong copyleft.