Having seen the edited OP now and figuring out the core message of this thread (it's not global politics from what I can tell): I retract my earlier statements about this being a shitpost and am now under the impression Jade has valid concerns about Cave Story and the forums going into a slow death, but expressed in an unfortunate first-pass and with an imperfect solution (that making "the community" in some vague way "nicer" will make the forums flourish again).
As opposed to... you know... a new game or merch or crossover or something in the IP owners power.
We can make more mods and modding tools and theories and community efforts and make our group sparkly-clean and inviting... but it'll be for the people either already here or for the small trickle of people who were already wishing to dive into CS fan content because they recently found out about and played the game from stuff outside the fanbase.
I'm not gonna suddenly get into Yume Nikki because of the community and fanbase doing awesome things, I haven't played the game (yet) so I'm not gonna be watching those places. I know of that game because people—here in a different community—told me about it and I'll hear news about like that re-release and the new game that came out etc. The reason I would be getting into a game is because from word of mouth in places that are outside of that specific fanbase that reaches me. People outside of that game telling me to check it out, just as it'd be someone outside of the forums and discords telling you to check out Cave Story before you'd even think to run into this community and see what's going on. Sure there's some things like getting the game speedran/played on a popular stream or a YouTube essay that can bait people who haven't played/heard of the game to watch and get interested that'll help drive forum engagement a little, but yeah it's still stuff outside that brings people into a fanbase. We just gotta keep a base level of kindness and support to keep the people here, which I think we have improved on immensely in the past handful of years (if not, again, I will listen to critique so that I can be a better example and help improve that which I control), it's just that there's such a tiny amount of people coming in and no new big official things happening that users are jumping out to do other things in other fanbases where there is new things to talk about. The internet has a recency bias, and people need to know of CS first to even see anything we do.