This is a very important setting. Both desktop and mobile hover effects, especially the latter, are very effective commercially.
Hover effect is the very thing that causes a user to view an image in the lightbox.
Information for developers
Configuration: Not to be used with hover effect — “display:inline-block” should be used only in case you encounter problems with page layout when hover effect is turned on.
Example: this could be the case with galleries where images are displayed in tiles.
By default, Ads.Mediabox adds “display: inline-block” style for all links (<a> tags), relating to the selector.