I am vegan (pull out the pitchforks) and am pretty vocal about it on here and used to be on the other website. I wouldn't say I'm an activist per se, but every comment and post I make about the subject whenever it's brought up makes me feel like I'm making a difference. If the comment resonates with someone reading and leads to fewer animals and animal-derived products being consumed, I'm happy. So yea, for sure.
Same goes for the two communities I created and mod (c/sekiro and c/bloodborne if anyone's curious). A bot has recently helped me fill the communities with content since engagement isn't super high from community members themselves. Before the bot, I tried to make daily posts in both communities, thinking it's content that I enjoy so others would likely too. Since they're still quite niche and don't have a massive following, I think it's definitely a good start for people interested in the games
Cool post btw. I think it's easy to lose oneself in the daily monotomy that is life and work and stuff, so reminding oneself that participating in communities such as Lemmy is making a difference in one shape or form