Reddit also had this exact same issue. For every r/flashlight you’d have a r/flashlights, r/realflashlight, r/flashlight2, r/torches, r/handbright, etc. Then you’d even have niche subsubreddits like r/flashlightslightingupdarkrooms. I never really considered this a problem because I like having different options available to me. I never really see the same thing posted enough times for it to be a problem, so usually it’s just twice as much content to subscribe to both, which I’m happy with. I wouldn’t really consider communities to be competing with each other, and the redundancy is actually really nice as a user. You’re free to only subscribe to the community you like more if you really want to limit your subscriptions for some reason.