Reddit is a centralized proprietary product, Mastodon is not. The worst that can happen to a user in terms of censorship is: * Your instance banning you, which

Reddit is a centralized proprietary product, Mastodon is not. The worst that can happen to a user in terms of censorship is: * Your instance banning you, which means you can just join another instance. The hardest thing about Mastodon is chosing an instance whose administration you can trust. The reason the service is valuable and important is that barring any instance being trustable to you you can always start your own. * Another instance banning you (or your entire instance) which just means users on that instance don't see you in the fediverse. This can lead to complications where swarms of instances cooperate their ban lists and thus getting banned from one of them can see you cut out of a swathe of the network, but in practice those using mastodon pride themselves on not centralizing and thus there is limited interest in centralizing moderation like this in the first place. Of note there are degrees of that second kind of ban. The lightest form is that you or your instance just doesn't show up in timelines - users can still find you by other means and follow you. The most severe is the total noop communication with that instance server which means its users don't exist to the instance doing the banning.