There is constantly threats like that in Fediverse. For instance some threatened to defederate if Tumblr implements ActivityPub and don't remove Ads and what no

There is constantly threats like that in Fediverse. For instance some threatened to defederate if Tumblr implements ActivityPub and don't remove Ads and what not. In reality biggest servers still federate with most servers. With latest changes in Mastodon you can now see whom they don't federate. It's not huge list, and if you browse those who don't federate with, it's pretty obvious why. A lot of those defederated services advertises themselves as some sort of free-speech absolutist alternatives.