I vaguely recall this as well. Wasn't there a migration to imgur in response to ...

bostonpete on Sept 27, 2013 | parent | context | favorite | on: Born of Reddit, Imgur now dwarfs the ‘front page o...

I vaguely recall this as well. Wasn't there a migration to imgur in response to some backlash against an alternative service that was doing something that pissed off redditors? Or maybe I'm thinking of a different controversy...