It might be an interesting adjunct to what is already here, but not in isolation.
My opinion is that members should review others' music without thought of getting anything back. From the little I've seen of Aaron, I don't get the impression that it's because he just doesn't care, but the result is still the same i.e It looks like he can only be bothered to spend a bit of time on others, if they first 'scratch his back'.
So, no...I don't think that's how the Music Cafe should be