This does not prove that they are goldsellers unfortunately, merely that they trade in a high volume in this particular item. There are addons whom you can set up a buyout
This work has been handed down to the specialist anti-cheating team and is not part of the regular GM duties.
Being a professional at Blizzard is a serious career that also includes (long) training. You can see an example here: https://careers.blizzard.com/ notwithstanding the amount of blame people already put on existing GM’s calling them “untrained bots”.
Most of the discussion was already held in your previous thread by my 3 posts.
Contrary to popular opinion, PVPVE is not the only activity in the game, but being a trading goblin is entirely legit. Ofcourse, that only covers the legitimate players.