I love Lemmy, but as others have already said, the vast majority of these signups are likely bots. Pretty spooky.

Another thought: making a community can also be a nice structured incentive to check in on your hobby regularly. I like looking for videos or articles to link to for my yugioh community even though there’s not many people subscribed - it gives me an opportunity to interact with and think about the game in different ways than I normally do.