Can’t directly answer your question, but I can say that I’m responding from lemmy.ca, where the hoster has provided all that information stickied from the front page. We know who owns it, how he’s hosting it, what the data volume is, and how much it costs per month to maintain. As subscribers increase, so do the costs, and hopefully so do the donations.
No one instance is going to replace the digg successor; various instances will come and go over time, just like web sites or email hosts. Some will cost money to join, others will have various other requirements. And they’ll all federate with some but not all other lemmy instances.