Oh boy oh boy, 150g! At only 675ilvl! Can't wait!
But seriously, high level missions are nearly as rare as Rare missions, and several Rare missions with much lower requirements already reward much more gold. And there are still no treasure missions with ilvl above 600.
On one hand, gold income from missions might jump significantly with trait increasing gold gains, but on the other hand, lack of balance between them, especially with 'profitable' treasure missions is kind of annoying.
It does not require 675 item level.And it is a level 90 mission.So you can send level 90 followers to do this mission and they can get the full of 1500 exp.
With 6.2, this mission requires level 100, up from 90.
As of 7.1 this mission appears to reward an Armor Enhancement Token, not the gold.
Garrison Timer Mobile App
[Upon completion your 随从 will gain: ]
Missions and Followers math for maximising success chance
Treasure Hunters: Making Gold with Your Garrison [Archive]
Warlords of Draenor Garrison Missions Guide