That’s why the response has been so negative. Every instance that federates with another stores a complete copy of the posts and comments from every federated user.

If the majority of instances do not defederate from a Meta instance, that Instance will inevitably become the primary destination for discussion, even between and by non Meta-Instance based users, just because the communities in that Instance will be so large and active.

Meta will then have carte blanche to collect data on a huge collection of users from outside their own Instance.

Fuck that.