P.S. I don't really have much interest in playing on servers, but I am a bit curious how much area is typically allotted per player on servers for mining GregTech ore veins.
IIRC on Kirara, it wasn't a specific area but they said try not to go past a certain distance from spawn, and based on # of players you could get an average area per person. It came out to many square kilometers each. On a related note, I calculated in a post last year that the rarest veins, like Platinum, would be expected to have one in a square area of 55 chunks on a side, or a circle of radius 31 chunks, which is just under 0.8 sq km (for default GT oregen). Of course expected isn't guaranteed, so each sq km lessens the chance that someone will get screwed, at least in the overworld.