Ok see that's the thing. "Eve-like, MMO-Style economics and persistence" is no different whether you and your buddies run a server or play on the official servers. That being said, as it goes with these sorts of things, I predict most folks will play on private servers they put up with their buddies or offered by the community. Private servers can have their own theme going, their own mods, their own rules. Additionally by running a private serveryouhave control over saves, backups, and any issue that comes about.
I suppose the 100 players per instance could be an attractive factor but we'll have to see. I just don't see the incentive to play on official servers as opposed to private servers when you can have mods, UI changes, customization, and the ability to save or backup when ever you wish. You and your buddies get wiped out, fuck it, reload a saved multiplayer campaign and go from there. Additionally on my own private server I don't have to contend with the bullshit economics that occur in MMOs.