Amazon has guidelines about photography and images you place on their site.
"Images are very important to customers, so quality matters"
"Every product on Amazon needs one or more product image"
"The MAIN image represents an item in the search results and browse pages, it is the first image customers see on an item's detail page"
"Choose images that are clear, easy to understand,
information-rich, and attractively presented"
Customer quotes:
"Hi Julian, I've just checked out the photos of the Spongebob square pants figures and I’m afraid to say I don’t like them….!
"Good news Julian, the direct result of using your photos, we have seen a 10% uplift in sales on items already, so many thanks!"
You can read more about Amazon and it's recommendations on the photographs you need to supply here:
https://www.amazon.com/gp/help/customer/display.html?ie=UTF8&nodeId=200109520