Mastodon was launched as a decentralized, social justice friendly Twitter alternative that was free of Nazis and harassment. But two years later, the biggest Mastodon instance is now Gab, a far-right social media network known widely as a gathering space for white supremacists.

Despite getting attention as a healthier Twitter alternative, most Mastodon “federations” have remained small. Mastodon—which functions much like an open-source Twitter—is decentralized in that anyone can set up their own “federation,” or server, but those servers can interact with each other.

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