Is it done by majority vote or does one instance have more control than others cough cough lemmy world cough if so then this is not really federated is it and with each instance we now have basically upgraded mod power to admin power so one more question is each instance independently monetized?
Yes
If an instance is nuked off the planet, anything federated in the past can be accessed from wherever else the content was sucessfully federated to
Does this also help with rollbacks? Beehaw had one last weekend that lost a few hours worth of content