I activated a Generous Customer booster today. One of my heli orders tonight was for over 17,000 coins! I got that one sent off right away since I had everything in the barn. I have never had one that large. Most of my heli orders are in the 2 to 3,000 range even with the booster. Right now I have 5 in that range, two in the 3 to 4,000 range, 1 in the 5 to 6,000 range and 1 in the 6 to 7,000 range.
I'm still working on building up the coin and have broken the 13,000,000 mark.