In general a good way to cut the business of gold sellers is by allowing players to access to in-game currency via payment and/or in-game currency to also allow purchase of real money good from the game.
However it turns out that it’s usually not their real business. Gold sellers don’t farm in-game to give you gold in return…True a small share do but that’s only to help them create the front and hide their true purpose which never was selling you gold in the first place… The reason they spam message on forum and in game isn’t to sell you a service.
They primarily want you to click. This will often give them a chance at trying stealing your personal info (game or not game related) for the purpose of reselling them or further scheming to steal from you.
Alternatively they would like you to c...