Its for the credit shop in FluxCP not in-game credits.
Try configuring it. Go to config folder...
// Use credits?
'ChangeToCredits' => true, // Set this to true if you would like to change points to credits. (does not work with ChangeToCashPoints or ChangeToCoins)
'PointsToCredits' => 10, // The amount of points needed to earn the rewarded credits. (needs ChangeToCredits to be true)
'RewardedCredits' => 2, // The amount of credits rewarded after accumulating points. (needs ChangeToCredits to be true)
// Use cash points? (or kafra points)
'ChangeToCashPoints' => false, // Set this to true if you would like to change points to cash points. (does not work with ChangeToCredts or ChangeToCoins)
'PointsToCashPoints' => 5, // The amount of points needed to earn the rewarded cash points. (needs ChangeToCashPoints to be true)
'RewardedCashPoints' => 1, // The amount of credits rewarded after accumulating points. (needs ChangeToCashPoints to be true)
'DepositKafraPoints' => false, // You may set this to true as well to deposit kafra points instead of cash. (needs ChangeToCashPoints to be true)
// Using coins?
// To use coins, your coin item MUST be stackable, you must be able to stack coins on top of each other, instead of having
// a whole bunch of separate coin items they must be able to add to each other.
// NOTE: Coins will be stored in the user's **storage** because there is no reliable way to store them in the character,
// since an account can have MULTIPLE characters.
'ChangeToCoins' => false, // Set this to true if you want to change points to coins. (does not work with ChangeToCredits or ChangeToCashPoints)
'CoinsItemID' => 7539, // This is the item ID of your coins, poring coins or whatever coin system you may be using.
'PointsToCoins' => 5, // The amount of points needed to earn the rewarded coins. (needs ChangeToCoins to be true)
'RewardedCoins' => 1, // The amount of coins rewarded after accumulating points. (needs ChangeToCoins to be true)
'StorageLimit' => 300, // This is the limit to an account's storage.
'CoinsStackLimit' => 30000, // This is the limit to how many coins can be stacked on top of each other (this is internally an eA limitation, do not change)