I didn't read the whole thread cause its fucking long, but I think what riigged is trying to say is that the people who buy from gold exploiters would not otherwise have bought that much gold. That is, the buyer would not have bought, say, 80k gold at the regular price. Hence, there is no potential profit to lose.
It's the same argument as piracy vs stealing items physically from a store. For piracy, the business is not losing money, as people argue, because the pirate would never legitimately purchase the pirated item, whereas when somebody steals something, the business looses the cost of production no matter what.