In terms of creating and identifying purchasable items across the web this is ace.
This works a little like Pinterest for a user, they can grab an image off any site and add it to the Crowdsend site, there they can either tag the products in the image or ask people what the products are, save them to say they want them, and see alternative products that people would recommend.
They also allow you to create shoppable images by adding a line of script to your site – much like adding Google Analytics. So retailers or people who put images on their blogs for instance can tag the products in the image and earn money when people purchase those items through their site.
By doing this they’re also creating a huge database of all the products across the web – so hopefully reducing the amount of duplicates they have and just get a library of images containing each item.