It was posted to both Digg and Reddit on the same day. The Digg post never gained any traction and when the server went down under the load MrGrimm deleted the reddit post (but not the digg post, since it gained no traction).

He made a second Reddit post the next day.

Source: https://www.reddit.com/r/IAmA/comments/9tlwi/im_the_imgur_gu...