I can only tell you from my point of view, i would never use a service like Imgur as a solution. As you ask yourself: Is it such a good idea to have them there away from my control? I would give you a resounding NO as an answer. No matter if it’s non-sensitive images.
Also FYI, if this below is still the case, you should stay away from Imgur, like you would from the plague, anyways:
Regarding your last paragraph, unfortunately I can not give you an alternative, as I will have to figure this out myself in the future.