I think what Skriver was trying to say is that the storefront will apply a promotion to all products if you simply leave that box blank.
Hover over the info box next to the "Valid For Product(s):" box and it explains that you can either enter what products you want to apply it to, or leave it blank to apply to all products.
In your example you wanted to apply the promotion to all products. If you wanted to apply it to a large amount of (but not all) products, I would probably just have used excel to form the comma separated list of products and then pasted that into the products field. No real need for WSI unless you're regularly updating the list of products under a certain promotion.
Last edited by donttryathome; 09-20-2012 at 11:48 AM.
Running: AspDotNetStorefront ML 8.0.1.2/8.0.1.2