In that expansion, NPC followers could get an ability called “treasure hunter” that doubled any gold rewards they earned from a quest. And “treasure hunter” perks stacked, so it was possible to get a few thousand gold per day, per garrison. Many casual players who had never had significant amounts of money before earned hundreds of thousands of gold during Warlords of Draenor. Players could sock away millions, since each character could earn roughly the same amount of gold from their garrisons, and you can have as many as 10 characters on a server.
Something to keep in mind as well is that this will make enchanting materials more valuable, since it is likely most players will now simply scrap their boe greens instead of getting them disenchanted. Also redundant dungeon/raid gear can be scrapped rather than traded to the (guild) enchanter in the run. Less stuff gets disenchanted, meaning there will be less ecnhanting materials, meaning their value will rise. All the more reason to DE rather than scrap as an ecnhanter. 
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