> Yes- LLMs and internet search are two different things, but LLMs train on the entirety of the internet, so you would think there would be some obvious overlap.

Mmm, kinda, but those image results only don't show 1,000 of the exact same image before showing anything else because they're tuned to avoid showing too many similar images. If you use one without that similarity-avoidance baked in, you see it immediately. It's actually super annoying if what you're trying to find is in fact variations on the same image, because they'll go way out of their way to avoid doing that, though some have tools for that ("show me more examples of images almost exactly like this one" sorts of tools)

The data behind the image search, before it goes through a similarity-classifier (or whatever) and gets those with too-close a score filtered out (or however exactly it works) probably looks a lot like "huh, every single adventurer with a hat just looks exactly like Harrison Ford?"

There's similar diversity-increasers at work on search results, it's why you can search "reddit [search terms]" on DDG and exactly the first 3 results are from reddit (without modifying the search to limit it to the site itself, just using it as a keyword) but then it switches to giving you other sites.