I just pasted the link and it’s not Oneboxing. I also paste a 2nd link the user used which also did not Onebox - but then I deleted that link as it has her user account number for downloading photos from that website.
Strange that it will not Onebox here. I just created a new reply on our forum, pasted the link - it Oneboxed and the security lock icon immediately changed from green to black with the warning exclamation icon… and the Onebox now shows a broken link for the photo.
http://www.freedigitalphotos.net/images/satellite-and-earth-photo-p234240
Edit: I just received a badge for my first Onebox… that doesn’t show anything but the link here on Meta. 