I also doubt Facebook throws away photo metadata when an image is uploaded.
The image that gets returned in your browser may have none but the original, with all its camera-identifying, time-stamped GPS located gold mine will be intact.
Yeah, I imagine the putatively photographer sites like Flickr preserve it. My assumption is that Facebook saves it, removes it, then allows the image to display. ISTR years ago some controversy about EXIF stalking on FB, but it may have been another service.
- "Remove All Metadata"
- "Remove Location Information"
- "Remove Person Information"
_All_ of these are removed by default and you explicitly have to enable them.