It seems that there are no withdrawable keys available in the credit system.
It's weird on multiple levels, as I think there is a GREAT AMOUNT OF CREDITS in the dispenser system right NOW that seem to WORTH NOTHING until someone puts in some keys in addition.
It's weird, because (as of my informations) the only way to get credit is possible by putting in keys.
It's also weird, because you charge fees for trading for credits, and there's a difference between the buying/selling price on csgo keys, so there SHOLD BE A SURPLUS in the stock of keys instead of a strong deficit.
Where did these keys go?
/Edit: It seems your Vault 02 is full of keys. Why isn't it attached to the system?