Raise your hand if you are honestly surprised by this. The Guardian in the UK has a story that details how China used its own prisoners in gold farming sweatshops. Prisoners were even beaten if they didn’t meet a certain gold quota every day. Prison guards would over see the operation and profit from it. One guard reportedly earned between $760 and $930 a day.
Anyone who plays MMOs will recognize the broken English the farmers use. I remember once in Star Wars Galaxies the farmers had a canned message they were spamming, and someone was definitely messing with them. At the end of the message, instead of saying “Thank you very much” it said “F- you very much”.