Mining Ore with Ziplex Z1 Seeker at the North-East region on Arkadia

I think there is reason North-East end of the map not to have teleporter. It's just not filled with minerals. That's 1 possible reason why I got 25% return. Also it may be because I globaled soon. Or the reason is my previous blog post and MindArk or Arkadia Studios lowered my loot to 25%.

Mining details:
Date: 3 of June 2011
Duration:
VU: 11.10.3
Place: Planet Arkadia, North-East region
Land Tax: 0% Hunting; 0% Mining
Resource type: Mineral Ore
Professions:
Prospector: 2
Miner: 2
Equipment:
Finder: Ziplex Z1 Seeker; MAXED; Range: 54; Depth: 204; Durability: Very Good
Extractor: Rock Ripper 1 (L); MAXED for ore; Efficiency: 6.6
Loot TT Value: 12.48 PED
Lysterium Stone: 7.24 PED
Veda Stones: 1.44 PED
Alferix Stone: 3.80
Mining cost:
Ammo: 50 PED
Drops: 50
Claims: 6 (12%)
Ziplex Z1 Seeker decay: 0.38 PED
Rock Ripper 1 (L) decay: 0.14 PED
Total expenses: 50.52 PED
Loot - Total Expenses = 12.48 - 50.52 = -38.04 PED (24.70% TT return)
(Formula: retturn in % = (loot/total expenses)*100)