If this is configurable Wikidata will be able to show page images on search results, nearby and inside page previews when enabled.
This is the result of the comments from: https://gerrit.wikimedia.org/r/#/c/333094/1/includes/ApiQueryPageImages.php
a) we already had to change it once, if it changes again we're covered. I'm a fan of making everything configurable.
b) just came to my mind that on 3rd party wiki instances admins might don't care is it free or any.