Industrial amounts?
Sure, it's completely fine to farm, BUT NOT TOO MUCH OR YOU GET BANNED!!
What is an industrial amount, though? What if I want to buy the BoE raptor for 3,5k. Is that an industrial amount? Please don't use such ridiculous phrases as if this was in the ToU with this exact wording, it would mean that the players are okay to do it but if a gm thinks he's doing it too much he can just ban him, no matter what the amount of gold the guy makes.