Its useful though its not that useful cause it only sees the image in your site not your whole site. I have a blog and most of the traffics are from images, worst is, the bounce rate is bad. They stay long in my blog.
the ONLY use is that it helps your VISIT NUMBER to go high else no fixed readership..no ad clicks...nothing it brings in NOTHING!!
It brings to some. Every traffic is good. Some are pretty good at converting image traffic. Even in this thread there were couple of good suggestions how to use it !
I get some image traffic on some of my sites, I don't really do much with it though. It's low quality traffic I think there's something oyu could do with .htaccess so that when they click through to view the image on it's own, you can rewrite it to a page which will benefit you in some way? I don't know about selling them stuff, a lot of image searchers are school kids finding stuff for projects, and their not going to buy anything. Disabling hotlinking is a bonus, though.
a simple way to help is to put your logo on the image somewhere - most likely the image is going to be posted on a forum or something so will increase the advertising of your website.
For those who use Wordpress here is a nice plugin. http://www.g-loaded.eu/2006/01/05/break-out-of-frames-wordpress-plugin/
Thanks for the Plugin...Works Great! +Rep I get like 300+ image.google visits a day....wonderful this can help me
Place a trademark at the bottom of image. EG: Come visit the main page. I need your visits so that you can continue this cutes photo> Helpful?