I once wanted to buy Minecraft but it wouldn't take a prepaid card, not through paypal either, but paying another paypal with my paypal then using the 2nd paypa

I once wanted to buy Minecraft but it wouldn't take a prepaid card, not through paypal either, but paying another paypal with my paypal then using the 2nd paypal with the balance worked. I wonder if that "exploit" is still around and why it was ever necessary.