Most people access the Fediverse through one of the large instances: lemmy.world, kbin, or beehaw. New or small instances of Lemmy have no content by default, and can most easily get content by linking to larger Lemmy instances. This is done manually one “Community” at a time (I spent 15 minutes doing this yesterday). Meanwhile, on larger instances, content naturally aggregates as a result of the sheer number of users. Because people generally want a user experience similar to Reddit, I think it’s inevitable that most user activity will be concentrated in one or two instances. It is probable that these instances follow in the footsteps of Reddit- the cycle repeats.
I actually think the Fediverse is in the beginning the process of fragmenting into siloed smaller, centralized instances. Beehaw, which is on the list of top instances, just blacklisted everyone from lemmy.world. Each of the three largest instances now are working to be a standalone replacement for Reddit and are in direct competition with each other. It is possible that this fragmentation and instability? of Lemmy instances will kill the viability of Federated Reddit altogether, but hopefully not.
These are my main takeaways from my three days on the Fediverse. I will stick around to see if the Fediverse can sustain itself after the end of the Reddit blackouts.
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It seems to me that calling this “lemmy.world’s problem” and expecting them to be the ones to solve it is disingenuous. You yourself say that you could “solve” it with your own custom tooling. Why not work on adding the ability to block users from a specific other instance on your instance, if that would be an amazing ability? Why is it only lemmy.world that has to do work to solve the problem?
Other instances also allow open signups, and there will no doubt be more of them in the future.
I think what they’re trying to say here is that lemmy.world is a site with a community and they’ve got a problem of having a toxic community that’s abusing another community. THAT is their problem and they need to fix it through moderation. Until then, other communities will do what they need to do to limit the damage caused by the users of their community. It’s not solely up to Lemmy.world to create the tools to fix their issue but it is their responsibility to moderate effectively, just like every other community has that responsibility and they have an incentive to work on the tools to make that job easier for themselves but also for all of the communities in the fediverse.