A text, or act is semi-private when it is effectively private, but open to casual, incidental, or word-of-mouth observation.
Wiki is semi-private by design. Pages are publicly available on the internet, and yet unlikely to be widely promoted or marketed because of the following features: - wiki is naked - the presentation is unusual - interaction is complex - presence of forks
This enables a strange form of openness, that could be referred to as the Elitism of Effort. To take advantage, or even respect the content, you need effort.