Heard it Through the Grapevine
I first heard about all of this from this thread on The Consortium. Many members were having massive amounts of TCG items bought up all at once, and were posting about it on this thread. Unfortunately my own TCG mounts I bought to flip months ago are still rotting away on the Auction House, guess they didn't like small servers. After reading UtesDad's comment on that thread I was curious about the actual method, and headed over to Ownedcore to see what I could learn.
From what I can tell there are possibly 2 dupes, although the info on this first one is less documented than the later one I'll cover. From what they're saying with this one you were able to log in to the game and Remote AH at the same time (you previously couldn't so I'm not sure how they got around it), and if you purchased an item from the AH, it wouldn't subtract from your gold total, but you'd get the item, basically generating unlimited gold. This would of course explain the Remote Auction House being down, but I can't verify this one. If it's true, the implications are going to be interesting. Here is the thread from Ownedcore with more details (slightly NSFW).
Bags of Money
The second one is a little different. If you've opened a http://www.wowhead.com/item=89125/sack-of-pet-supplies, http://www.wowhead.com/item=94207, http://www.wowhead.com/item=98546, or any similar bag since 5.3 dropped, you'd notice that there's a new looting mechanism for these bags, where using the bags doesn't have a normal loot interface, but pops up as if you won something in raid finder. Blizzard changed the mechanisms for these bags in 5.3, apparently because they now include protection for bad luck streaks in their algorithms (from patch notes):
"Protection for bad luck streaks have been added to Battle-Stones from pet supplies bags and wild battles. Each bag or battle that does not provide a stone has a progressively better chance to award a stone to the player."
So apparently Blizzard didn't have the foresight to put a cooldown on these bags, and if you macroed it to your scroll wheel you could trick WoW into thinking you opened 30-50 bags, or more. Since these bags all contain gold, it basically gave you a license to print money. If you want to read some more about logistics, here's the thread from Ownedcore. A very interesting set of exploits, check out the threads to learn more, it will be very interesting to see how Blizzard deals with this in the days to come.
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