> You have us completely irrelevant hits.
Pinterest is intentionally designed to facilitate rich context around images. That’s kind of the whole idea and value proposition of the service.
Most “Pins” are created with the Pin-it button browser extension or JavaScript embed which associates the website the image is on and other context with that image and retained when “uploaded” to Pinterest.
In the long tail, yes- there are Pins that are void of context because of incorrect user submission (direct image upload) or broken links as a result of the website owner not redirecting when the content is moved. This was a continuous problem that everybody was interested in solving.