[lambdadmitry]

Until you encounter an instance that blocks any instance federating with what they consider undesirable. Then you have to choose.

[turtleyacht]

Oh, so it's like a viral thing? If your instance follows an instance that has blocked all other instances, then your instance cannot view those blocked ones.

Maybe I don't understand it. Or maybe that's the idea of federation.

So, the solution is then to have your instance join the larger federation (for convenience), and then sign up as just an account on all other blocked ones. I guess.