@Vortax
Instance admins can choose with which instance to federate, afaik our instance admins didn't censor any other instances. Some instances don't show in your timeline either because that instance is unaware of it or just federates with too many instances and you just didn't see toots of other instances because of spam. As for choosing instances most of them have some topic for debate or to relate to but in general you can toot whatever you want, I choose this one becase of topic.