How to make sure you select the influencers with the best content.
Preview will allow you the option to see the influencers post before they would go live with them.
As a step zero you'll have the ability to require a preview of contents from the influencers before actually posting it.
You can ask for a preview only for a single content.
When you are setting up a new campaign make sure to check "Enable Preview" in the basics section.
Don't forget - the influencer only can upload the link or the picture as a preview!