[rdhatt]

I work for a company that sells images online. I could see a technique like this being used for NSFW images that come up in our search results. It would allow you to have an idea of the image before clicking into the image detail page to see the normal watermarked image.

[truth_]

Duckduckgo does some kinds of shenanigans with images that appear as a result of an NSFW search.

[rognjen]

That's an interesting hypothesis.