Have you tried calling them? How large was your first order? Did you do smaller orders first, shipped to your same address? in truth, nobody knows how their algorithm works ... .
From what I understand, calling doesn't help. So many people say that they are banned by GCM and that it is impossible to understand what triggers a GCM ban, but is there a collection of data points that has tried to understand?
I've heard people discuss, variables in actual GCM activity: First order size could be relevant but doesn't seem determinative (since some people make $1,000+ first orders and others get denied with $200 first order attempts). The same for velocity, addresses, credit cards used, etc. They all probably are relevant but take too shallow a look.
I've recently heard people say browser/cookie/cache issues resolved their problems. Is it really that simple?
Lots of banned people should mean lots of available data points. But I also wonder what data would be useful for the data points? I know how you connect to GCM (i.e., IP address) is relevant, since they've called me after a switch in IP address. But I'm especially curious about the bans for first-time orders. Does GCM have access to what credit cards are used for gift cards at Simon malls or Staples? Does non-GCM activity trigger GCM bans?