It's not the Goddess of Great Things, or the Goddess of Massive Profit, it's the Goddess of Wishes and wishes aren't worth a lot, are they? My wishes are pretty weightless and obviously don't impact reality much as they are sol seldom fulfilled. So of course a "Goddess of Wishes" can't give a lot. It's just logical, right? You ever weigh a wish? But I agree that the work to get one is not well rewarded as the work was more concrete than the wishing. And that it's going to take a about a billion of us wishing to make the Goddess of Wishing into the "Goddess of Something Grand."
AJ