It depends on which perspective you have.
From my perspective, the true purpose is to encourage people to contribute to the site by writing well and helping other people write well.
From your perspective, I suppose it might be similar to trophies or EXP points, where the point is to have a demonstrable and tangible outcome to strive for. Or, maybe, it's a team sport for you.
I think you'll find that the next update will include a feature that makes order success a little more visible, so that might change your opinion, too.