you can use gold for…
dungeon boosts to level faster
blue/epic boe & crafted gear
consumables (fap/lip…etc)
portals portals portals & summons.
epic mount
in any pug you can whisper the item winner and offer them tons of gold to buy the item
contact top guilds and buy certain raid item or full items.
also you can brag about being rich and give girls gold to enslave them J/K
i personally don’t think blizzard banned gdkp to stop RMT, they just banned gdkp because they are clueless and not doing anything toward the bots or the gold buying/selling.