OP didn't profit from this exercise, so "fraud" doesn't enter into the conversation. If more people did what OP is doing, incentives would maybe finally align for Amazon to do the right thing, if for purely financial reasons.
As it stands today, apparently there's more profit in ignoring these scams then there is preventing them, so Amazon doesn't apply effort in that direction.
Was OPs purchase in good faith? No, I guess it wasn't if they were certain it was a scam. But it sure isn't fraud.