Nerdy Calculations.

Hmmm. AK-Gold/M4-Gold is 90 (100?) coupons. Bob wants one.
Let's assume Bob buys ZP crates because GP crates give you less coupons.
10 crates for 8K ZP.
In the Item Mall, you can purchase 20K GP for ~2K ZP. So lets say 1 ZP=10 GP. Just a rough estimation.
If Bob wins 100 coupons in 200 crates, he will have spent 160K ZP, the equivalent of 1.6 million GP.
1.6 million GP!!!
Um yeah. That's All.