I think the current rule of 3 posts per day should be sufficient. But then I also think that should also include all uploads so if you want to use your uploads in a combination (ie. marketplace, gallery, and free-stuff), then that would be your three uploads for the day. Just my opinon as I don't believe in limiting people too much, if you think there are too many pics in the galleries on a daily basis, nobody says that you have to look at all of them. Or, you could use the viewing filter and just choose to look at the artwork submitted according to the program you are interested in. just a thought.