Comments of chapter undefined of The Earth After Rebirth

S rank growing skill for a F rank quest ... What is he supposed to gain from S rank quest ? ZZZ+ ultra super duper mythic?.. Nonsense rly... And 500 gold from doing errands lv1~3 for just a bit? What about when everyone is high level? They can all gain billions from high end quest ?.. One of the key of games is balance... Makes no sense so far.