They are spamming in chat box everyday to make you know their existence.
Once you purchase with them, your money flew away, If you open dispute on Paypal, they ask you to close and delivery man is ready to give gold in game (sometimes, they give you better offers, this will blind your eyes with a very nice reason, it covers for their delay to give gold => your blindly step one by one into their trap)
NEVER PURCHASE WITH SCAMMER! IF YOU ALREADY DID, DO NOT CLOSE DISPUTE UNTIL YOU REALLY HAVE MONEY IN GAME, OTHERWISE, GET REFUND