[Useless]

There are two solid reasons for accepting submitted galleries.
1. It gives your TGP a much more and a wider array of content without you having to personally dig it up from sponsors.
2. You will receive traffic from your recips submitted galleries. Not a ton, but a more than you have now.

You make money by posting your own galleries high on your site where surfers will be clicking first, as well as from banner placement. Of course, if you are a heavy traffic trader don't bother using advertising at all because you won't be giving the surfers a chance to see it anyway. Traded traffic is low quality and requires much more traffic to produce a sale. I'd rather funnel the Mormon Tabernacle Choir's 404 traffic to my TGPs than get into the trading game again.