I think this is a weak point in your chain of reasoning. The supplier is not a friend to Ballbids, he merely sold them four snakes.friends of enemies
From the one post he made, there is nothing to show that it is an ongoing relationship. In order to be judged culpable in any way, I think you would have to show that the supplier knew about the shenanigans Ballbids prior to seeing this thread and prior to his sale to them.