Bing has a search feature that lets searchers see relevant images from a search result for a specific query. There is an "images" button next to the search result snippet, that when you click on it, it pops up a carousel of relevant images from that site.
Need For Gaming spotted this and shared it with me on Twitter - I can replicate this, so I guess this is a feature and not a test. Here is a screenshot that you can click to enlarge:
You might be able to see it yourself for the search query on Bing [roblox promo codes].
I kind of like it...
Forum discussion at Twitter.