I one time posted an album on Imgur of my hobby project. I was hoping it would do well on the niche subreddit it involved.

It did ok on reddit (100 upvotes) but a few thousands upvotes on Imgur and made the front page with hundreds of thousands of views. I was shocked since I didn't even know that was a thing. But my guess is popular with people who are on their phone a lot, are not as tech saavy, or international.