> If facebook prioritizes certain kinds of content, that stuff will inevitably be what gets shared and commented on more often, and given the size of the potential userbase, they'll effectively be able to set the tone and the topics for the wider network.

The tone and topic a user experiences will always be set by who they choose to follow.

By that logic the largest community on the Fediverse controls the tone and topics of the Fediverse, so should they be defederated?

You like your community here? You can keep it just as it is. Nobody is taking your friends away. Your home timeline will look exactly the same: the same friends accounts posting and boosting content they enjoy.

If you're worried your peers may start using those services which may cause your social network to split someday help make the experience here better that there