I currently have an image hosting site that is around 4 years old. I have never spent much time marketing the site and with word of mouth there are a handful of paying users. Some of these users have thousands of images on the server and are committed to me for the long run. But, are there any Black hat methods of tapping into this site and earning money off their images they have placed on the server? There are thousands of accesses a day for their images. eBay is probably the most active referrer in the logs because many of the users are running auctions.. Any ideas welcome..