the Brave browser could have been Chromium with uBlock Origin pre-packaged with it. That's it. That's all it ever needed to be.
Looking around the codebase, it's filled with eyebrow-raising things like direct integration with specific crypto exchanges. Heck, it still has a whole automatic affiliate fraud feature present in the code, but disabled by default.
The truth is, the mission statement is not commercially viable, because it was always trivially achievable as a non-profit project.