lemmy.world will definitely give you a bigger pool of potential subscribers to pull from but Beehaw is defederated from lemmy.world at the moment. So people from Beehaw couldn't participate until we refederate with them.
There was like, a whole thing. I still see memes from lemmy.world users about it whenever I log into that account lol. To summarize, Lemmy moderation tools kinda suck for the time being and to maintain the chill Beehaw atmosphere it was easier to defederate until better mod tools get developed because they have open registration so a lot of trolls and bad actors from lemmy.world were coming into Beehaw bein' dicks.