This crap has to have been one of the greatest scams in the history of this community, and it's still on-going for some reason. I suppose furries aren't the most mentally stable people, but you shouldn't fall for scams like this.
You are quite literally paying someone for a pattern of fur or a glowing dick, and they can't enforce this pretend-copyright you're paying for. Nobody can enforce it, because it's not legally binding. I can right click and save your dumbass fursona ref and call it mine and there's nothing you can do about it.
It's akin to having a doll collection, except you don't even own the dolls. They're just designs someone paid for, and then sold to someone else at probably an even higher price for the unique trampstamp tattoo they got on the left nutsack that's apparently so sought after in this community. People are paying for it, clearly someone wants them.
Maybe I'm the weird one, but I don't get it. At the end of the day, it's your money, anyway.