How many of are still fighting for regions in North America. All the zones have been taken up, though you can still fight for zones where your faction has not reached 100%.
Be the first to get 100% and you'll receive 2 pieces of dark matter. Be the last and you'll only get 1 piece. Now I can understand if you want to fight for a region that still has 5-10% to go. It's not an enourmous feat, but if its like 70% then you're better off fighting in new regions.