The number of writers is not automatically the number of subscriptions
World Anvil’s FAQ says co-authors do not each need a Guild membership to use Guild features in the owner’s world. They need World Anvil accounts; the world owner maintains the membership. For a small setting team, that is a concrete reason to examine the collaboration feature before assuming every writer must buy the same subscription.
The chosen tier still has its own collaboration scope. A co-author who contributes text and a subscriber allowed to read otherwise-private material are different roles. Pick the role that answers the actual task rather than adding editing access merely to share a piece of lore.
Private does not become public when membership ends
The FAQ gives a specific post-expiry condition: private content remains private, and the owner can still see and access it, but editing private content requires making it public or renewing membership. That matters for a project expected to revise unpublished material for a long time. A short burst of membership does not establish an indefinitely editable private workspace.
For an active co-writing world, the owner-controlled membership can make sense. For a one-time private draft that should remain editable without a hosted-service commitment, ordinary documents may be a better working base. Choose the service when its connected world and permission roles are useful enough to maintain, with the actual post-expiry editing condition understood from the start.
Sources & further reading
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