I'm too lazy to search the forum for answers, so what was the problem? It wasn't just a bitcointalk and reddit issue, was it?
No, it was not solely a bitcointalk or reddit issue, but affected both forums significantly.
Imgur made changes to their domain name, from imgur.com to imgur.io, and along with this made changes to their terms of service which invalidates any old image not linked to a registered account on imgur. This lead to so many images posted on the forum through them being broken at the time.
I think this was the first thread
[1] on the issue.
[1]
https://bitcointalk.org/index.php?topic=5452415.20- Jay -