Some images are base64 in URLs in Google image search results for their thumbnails. Does anyone have any idea why?

Search "Pepsi can" and some when you right click > copy image address will result in "data:image/jpeg;base64,/.../" instead of the website's image. Presumably to limit server cost / make the browser render? It's not for all sites, so perhaps more common sites (Walmart for example) it gives the correct image URL.

Pepsi can image from:

[1] https://crescentmarket.shop/ data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2...//9k=

[2] But when you click through: https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQwXbLG...

[3] Paperpunchplus.com shows the correct image URL https://www.paperpunchplus.com/https://cdn3.evostore.io/prod...