driller41 - 9:17 am on Jan 31, 2013 (gmt 0)

It was mentioned before, but the only thing we can do and really should do is to have multiple image folders, one for thumbs and one for the bigger images and maybe add watermarks to the smaller images + clear words that the big images can be found on site xx

It is worth a try - perhaps adding text over the image such as 'did you know that...' and add something related to your site, something to entice a click through - you have the viewers undivided attention with the current google system as they are only displaying the one image - and it will piŁ$ google off which is good :)

The problem is you would have to serve these promotional images to google and bing and keep them from your proper images.