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September 11, 2013, 05:43:43 AM |
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Bitstamp (and all other EXCHANGES as far as I'm aware) does not actually keep a balance in the deposit address they give you. It's simply one address generated in their bitcoin instance that they marked as belonging to you when a deposit is sent to it. When they send money to other users for withdrawals, there is a chance that the funds will originate from your deposit address.
Basically exchange wallets are a giant safe with lots of little slots for depositors. Money from people depositing into exchanges to in a slot designated for that user, but then they're just in a giant pile and get pulled from as needed to fund other users' withdrawals and/or moved to cold storage. They internally keep track of what balance each user is entitled to pull out of the money pile upon request.
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