We don't allow the transfer of existing store credit back to credit cards or Paypal accounts for a few reasons.
Because we offer 110% the purchase value as an incentive to choose store credit for your return, we cannot refund that amount back to the original form of payment which would be less than the Store Credit amount.
Often times, Store Credit can be used on multiple orders, it can get convoluted down the road when store credit is redeemed and refunded over several subsequent orders. Tracking down the original payment can get tough and leaves us open for fraud.
We also say in our Return Policy that we can only refund an order to the form of payment used for that particular order.