OK, I see that problem. In fact I remember having the same issue myself. (Presumably this will create a secondary confusion problem for “All” subscribers, who will see the content of their feed gradually expand without explanation as other users subscribe to other foreign servers, correct? Whatever, I don’t care much about them, someone who subscribes to “All” apparently doesn’t know what they want anyway!)

So the optimal solution here would be for each instance to preemptively connect to a whitelist of known foreign communities, perhaps? Or maybe each instance could regularly ping other servers in order to update its search database with popular communities.