I'm sorry if i have a brain size of a cat, but if a Card is "marked" how do the creator or user sees it and detected it ? does it visible inside a Koikatsu studio ?
Let me put this in a simple manner... We're not the only ones that lurk here, wild concept I know but they can just download the card and check what mark they left on it. Simple as that, we're not some secret society with state of the art IP confirmation software or something, we're a rag tag bunch of pirates that run a server on hopes, prayers, and whatever Tommy and Bobby cook up with cheap alternatives.