I uploaded an image from the web today, from http://imgur.com/.

However SO takes the image and reuploads it to http://imgur.com/, if the image from web is from http://imgur.com/ then it doesn't need to bother wasting space and bandwith hosting duplicates of the image.


The idea is making sure that the image is permanently available, which when linking to an external image is not ensured. You can however manually do this via ![alt text](http://url.to.img). But please only do so when you're certain the image won't go away (I mean, even after years!)

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