Unfortunately Wix does not offer a simple integration with Fotomoto at this time, but we are investigating the possibility of how Fotomoto might be used with Wix Studio.
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 see an officially-supported integration with Fotomoto. Otherwise you can use one of many supported solutions listed on our How page.