Distfiles and packages with unknown **redistribution terms** are unsafe to mirror by FreeBSD project. I've looked inside distfile and [download page](https://app-updates.agilebits.com/product_history/CLI) but couldn't find a license.
The change is technically under "portmgr blanket" but maybe maintainer got a license under NDA. If so it's unclear what's the policy about keeping such ports in the tree.