I just tried the power hour and didnt get gold

Did 3 times destroy the encampments bc I thought thats the best option for mist monster spawns, didnt look at the rewards the first time and then I did look at the 2nd and 3rd time, didnt get any gold is that normal? I dont get it.

Was it bc I did the same mission over and over? Or do you get it after the power hour or smth?