This question was asked a while ago. IIRC, the purchase of gift cards is considered a cash transaction and not counted towards your RDM spend threshold. There was an additional aspect about how the transaction was identified by the seller in terms of identifying it as a gift card purchase and then yet another sub-discussion about how gift card sellers were no longer taking CC's in payment for gift cards. At one point, there was mention that about the only place that allowed a CC for gift card purchases was Simon Malls.
You might get better, up to date info in the Manufactured Spending Forum.