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This wiki was unsuccessful in achieving its original goals (see https://www.quora.com/What-is-the-difference-between-Wikipedia-and-Citizendi...). A dedicated few writers have continued working in the wiki, improving articles that they believe are useful, and which for various reasons probably could not be written in Wikipedia. On or about Sept. 30, 2020, we plan to end Citizendium as a public "open" project, yet (possibly) keep the wiki running and editable by a combination of donations and subscriptions. How this might occur is still being examined.
Original announcement https://en.citizendium.org/wiki?title=Welcome_to_Citizendium&diff=100864...
basically - nobody's editing anything any more, and the money's running out.
- d.