i'm still scratching my head about things like: the difference between "hot" and "top" because they have different definitions from instance to instance; sometimes i can't subscribe to another's instance's communities without creating a user account on that instance despite seeing them in the "all" filter in the first instance; and the very heavy mainstream dominant viewpoint on the fediverse that completely drowns out anything else.
sometimes i can’t subscribe to another’s instance’s communities without creating a user account on that instance despite seeing them in the “all” filter in the first instance
This should only be the case if the 2 instances aren't federating together. it might be a specific bug, can you give more context on what you couldn't do?