I have seen lots of players in a fan group have full stash tabs of t12 gem, GEO, GET stacks and tons of trial belts... They sell them for real money and restock those goods in just a couple of days. I've wondered if the item duplication bug still exists and I've read your post. Thanks for clearing my doubt :D
Actually legit players like me feel sad and discouraged because there are still a lot of cheaters in this game. They still get benefits from the exploit and get no ban.