I don’t know what a .webp file is but I don’t like it. They’re like a filthy prank version of the image/gif you’re looking for. They make you jump through all these hoops to find the original versions of the files that you can actually do anything with.
I suppose another solution might be that it falls under those lines, but some misbehaving services where they’re uploaded are giving out improper filenames and not confirming the type.
Though I can’t imagine many of those being incredibly popular, or, it’s just that images are recycled for so long that eventually many of them hit such a site in their lifetimes.
After reading through more comments in this discussion, maybe I have my answer, at least partially. A lot of people here suggest to use extensions and other ways to convert webp from the web to… PNG.
And then that PNG gets shared further…
Oh gawd if that’s why so many pngs are on the net… What a way to take a good idea and completely fuck it up. Now instead of a 2MB jpeg or 0.5MB webp we deal with 10MB pngs 🤦♂️
Anyway here’s my take on it