Hi,
yes, you can create a Product Catalog from the admin of Pixel Caffeine and you can automatically push it into your Facebook Ad Account 🙂 Just go to Pixel Caffeine > Product Catalog, configure the feed if you want filter for specific categories, or types, enable the Automatica Upload and then go to generate. The plugin will generate the XML for you and will send to Facebook the URL in a new Product Catalog or in an existing one (that you can select in the options).
Then, you can check in your Ad Account if the product catalog is uploaded and also you will receive the feedback from Facebook about the status of uploading. Also, Facebook will set to fetch periodically (also here you can define when) the XML in order to update the catalog automatically.
I don’t know about PixelYourSite, but this is what Pixel Caffeine offers. If you have any feedback, I’m here to get it 🙂