Unfortunately Fotomoto will not work on Wix websites as they don't allow the needed JavaScript to be inserted in to the page code.
We would be happy to see Fotomoto work on Wix; if you're a Wix user and want to be able to use Fotomoto to sell images on your Wix site, please contact Wix and let them know that you'd like to use Fotomoto on Wix.