That's one of the important questions that concerned me ... who owns the instance I am on. I can appreciate that these systems are all independent of one another and the whole is not controlled by anyone entity or person. But I would like to know who the owner of the instance I am on.
Maybe that should be an important feature to share with everyone up front when you subscribe or sign on to any instance ... a description of who the owners and controllers of the instance are ... who are they, are they just one person? a group? who are they? where are they from?
I understand we have to be private on the internet but if you want to promote being an open and shared universe of users ... one of the most important pieces of information for me is in knowing who pays to run the service I am using for free.
On the flip side of that ... if I know who the owners of the instance are .. and I like them .. then I would be more than willing to send donations or a subscription to help them pay for the services I use.