A (stolen) credit card isn't cash. The whole operation here is to turn someone else's credit line into usable funds.

But also, why would sending funds to Apple make them dirty? That doesn't make sense—as GP pointed out, sending funds to Apple so that Apple sends those funds back to you is what makes the money clean. It's the difference between depositing $50k in your bank account from a drug deal and getting a $50k direct deposit from Apple's developer program. The latter won't raise a single eyebrow.