Hi. I would like to ask about the drop rate of NTG. After I have made some progress in my base, after successful attacks I started receiving NTG drops. Then I realized that I needed scrolls from the Greeks, so I only started fighting with the Greeks. After 7 successful attacks (mostly with 5 stars) I got 0 NTG. So maybe the drop rate is low and I was very lucky in the first fights, when almost every victory gave me NTG - OR - the Greeks are bugged. Ideas?