Just wondering if anyone has done some research to the effect of placing ads on a site that is actually selling things. Our main income comes from a site where we sell products we make ourselfs (mugs, mousepads etc) and am still a bit in doubt what effect it will have on the sales. I am trying it out on a second site where we sell things we make but which isn't our main business and keep a close eye on it. I know it all depends on the site and product but still would like to hear your thoughts and suggestions.
AdSense is clearly a bad choice for supplementing your income from a sales driven site. Use an ad system that allows you to launch the clicks in a separate window.