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I suppose moderators would be chosen based on reputation and trust. The details will be filled with interesting twists. I propose the mods be elected like witnesses.

In specialized matters, where expertise matters, democracy and meritocracy may be worse than pure technocracy, which can yield bad results too.
There needs to be some initial board of electors to elect those worthy and deserving of having a right to elect, which is an oxymoron and recursive.
These are governance issues.