Ok, so I'm going to do some number crunching here to give a rough estimate of how much gold was injected into the SC market. This is "best guess" rough round numbers blizz math that makes a lot of assumptions for sure.
1) Rate of duplication:
Let's assume that each account involved was creating and canceling 10 auctions every 10 seconds. Sounds pretty reasonable to me. Each time they duplicated 2B gold. That's 60B per minute or 3.6T per hour.
2) Time spend duplicating:
Let's assume that there was a 6 hour window of time where duplication was possible. Let's also assume that each account duplicating had to spend 50% of this time duplicating, and 50% of the time injecting the counterfeit gold into the economy. That gives us 3 hours of duping.
At this point we have 10.8T duplicated per account (3 hours of duping at 3.6T/hour). Blizzard stated that 415 accounts were involved. This would give a grand total of 4482 trillion gold duplicated. 15% of that is 672 trillion.
672 Trillion gold.
Honestly I think that's a pretty conservative estimate. And it is a lot of gold.
Those estimates are off because there is no way we will ever know just how much gold has been duped to begin with.
Why do I say that your numbers are way off. It is simple really it is. Answers to the following questions will prove it.
How many players actually sell their gold on the RMAH?
Do players actually buy gold straight from the RMAH instead of purchasing gems with real money and selling them for gold?
What is the best way to buy gold with real money straight up, or buy gems with real money and convert them to gold on the Gold Auction House?
Did all of the players in America start playing the second the patch went live?
I have seen a lot of players come here saying that they cannot sell their gold straight up. Why because the majority of players do not buy their gold from the RMAH straight up. They use their real money to buy gems. Then sell the gems on the gold auction house.
All that is needed is to remove the exact amount of gold duped.