Spyra didnt go into detail, but I can give a bit more general information. He stated that we always start with the goldseller. We can do this based on how gold is generated.
There are three basic sources of gold for gold sellers:
Gold/Items from stolen accounts.
AP items bought with stolen credit cards.
Whenever we are more effective at preventing any one of these methods, they increase the activity of the other two. The gold sellers will find a way to meet the demand, and each of the methods used causes problems for players.
The process to track, and find each of these sources of gold is complicated, and difficult. It normally requires following a chain of activity, and results in us finding where the gold has been accumulated, and then sold. When we are cleaning up, and removing the accounts... we also find the players that received the gold.
Sometimes players involve their friends (knowingly or not). If you have someone else play EE using your internet connection... and they decide to buy gold while doing so, and then give you half.... we are sorry, but they just made you a partner in their crime. If they do this multiple times... then you are stuck with the punishment as well.
We apologize that we can not effectively detect and track the activities of the goldsellers 100% in real time. It takes time and energy, and that means that people have the opportunity to buy gold.. often multiple times, before it catches up with them. In doing this, the gold buyer has paid a third party to harass (bots) or steal (account/cc) from others, just so that they can have more gold. We dont think that this behavior is something we want in our community.