If you're only sending 500 hits a day to a sponser then a sale a day is about the best you can expect these days, unfortunately. Most sponsers require upwards of 1000 uniques to make a sale. I've got some cool videos for your tube you can use, for this site:
www.erosexotica.com
This site converts at around 1:400. My AP doesn't have any materials on there (yet) so hit me up via ICQ and I can get you some vids to use. Make sales baby!