Doing the math, that works out to only 1,000 gold per banned account. This is a fair chunk of virtual change for players at low levels, but it isn’t that much for a higher-level player—an epic mount costs nearly that much all by itself, for example. This seems to indicate that the gold farmers don’t have any magical method of extracting gold from the game, but are stuck doing the same repetitive tasks as the rest of us chumps (although perhaps with the assistance of extra tools to help automate this process).
It’s about 1,000 Gold per account, but also 1,000 accounts per day that they ban on average. It’s great to see a company take a strong stance on the matter.