If your business model is just throw enough shit, and something will stick, you will always have grief.
If you are doing niche, general, or whatever... you need to do you homework, and if you submit to 10/100/1000 small targeted tgp's (or traffic source) for whatever it is you are selling, then you will make better conversions.
It's CONVERSIONS that make or break you. If you did a foot site, and you submit to general, ass, tit places for traffic, even if 1000 times more traffic hits your stuff, you will not convert.
If you submit to 10/100/1000 highly filtered, targetted places, you have a better chance of a sale, or conversion. Whether you are submitting your own paysites, or a gallery submitter, you need to make a better business model to get the targetted, filtered surfer who will actually BUY.
