Steve Bate@helge @hrefna Rephrasing the question as "Why does ActivityPub not define a concept of ownership?" may be better. The other issue with the vague reference to "owned by the server" is that "server" is not defined anywhere. What defines the scope of server ownership? Maybe a URL prefix (to support multi-tenant implementations)? Or attribution to an "application actor" (or "tenant actor")? It's definitely an underspecified topic.
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