Taken from: I’d like to get my store’s products listed on mySimon. How can I do that?
“Our non-tech listings are powered by Shopping.com. Our tech listings are powered by CNET.”
So if you have non-tech products listed on Shopping.com and someone searches for them on mySimon, your listings may appear on mySimon.
-MM

We have recently updated categories on Shopzilla. Take time to go into your account and look at how your categories are mapped up. You may have some categories that aren’t the best for your products. This should be a common practice at least a couple times a year. I like to go into my accounts [...]

As you advertise on the CSE’s you will find out how each and every one has different requirements for your data feed content. Most of them have the standards: UPC, Name, Description, SKU, MPN, Image URL, etc…
On Shopzilla, they have all of them including an optional Promo Text field. This allows you to add promotional text [...]