Effective? No. Considering the purpose of all internet communities is to grow and have diversity, it’s not effective. Aside from the currently low number of users, the fact that you can have the same community in different instances means a community will never grow large enough. Add to that the “you’re literally killing children if you’re a centrist” people and all the tankies, and what you have here is a leftist circlejerk that will remain small and irelevant enough to suit its need to be an echo chamber without any actual diversity. So maybe it’s effective from that point of view? Idk.