Casino game thumbnails should behave like profile pictures because both need to...

https://ace-wiki.win/index.php/How_to_Check_If_Your_Thumbnail_Text_Is_Readable_Without_Zooming

Casino game thumbnails should behave like profile pictures because both need to stand out clearly at small sizes. On small screens, a single focal point grabs attention quickly. Use strong contrast and tight cropping to highlight that focal area