Because many people hotlink directly from the site. And If I'm going to host the images myself and eat the cost of bandwidth I might as well derive some value f

Because many people hotlink directly from the site. And If I'm going to host the images myself and eat the cost of bandwidth I might as well derive some value from it. I provide a link to where the original images was taken from, so if anyone is interested in the image without the watermark they can get it from there.