For my personal selling, I wouldn't trust the API's:-). However, I have a product that helps a particular retail vertical list their items for sale online. I imagine my clients wouldn't mind having their items automatically cross-posted to Facebook's shop as well. (So, if Facebook kills the API, it would kill a feature in my product, but not my whole product.) That's why I was wondering about the API. I'll probably need to do some reading and searching today when I get some time!