As my experience, even Google updated their algorithms carefully and unfamiliar, but the "truth" of two factors help you getting ...
1. Detail or Unique Articles
2. Photos Post or Infographic
- You'll spend a lot of effort if you want to store and edit photos of the original post.
- If the photo is Infographic, then even more people want to link back to original post, simply bacause that image will take a lot of host bandwidth if you store on your hosting. And if you upload to a free online photo service, the image will have not a standard size and color, or have no long age.