Unfortunately, you won't be able to vet the articles before they go live.
We have a network of 1000s of publishers we work with. We are pitching them deals every day and are publishing 100s of articles daily on their behalf.
The editorial is driven by the deal/sales page. You get to control the deal page copy/images and that is the foundation of all the editorial. The editors look at the deal page and extend their editorial coverage from the content on this page.