"Source available" label

[ThatOneCalculator]

Right now applications can either be marked as "Open source" or "Proprietary", but I feel there should be a "Source available" label. Take https://flathub.org/apps/io.anytype.anytype for example – their repository is available under a source available (but not open source) license, so the paragraph

This app is not developed in the open, so only its developers know how it works. It may be insecure in ways that are hard to detect, and it may change without oversight.

Is inaccurate to this application.