A post whose source is a direct link to a Instagram image, rather than to the Instagram post containing the image. These are considered bad links because there's no way to find the original Instagram post from the image link.
Posts missing the Bad Instagram Link tag can be found using this search: source:*fbcdn.net* source:*instagram* -bad_instagram_link | source:*cdninstagram.com* -bad_instagram_link
This tag implicates bad_link (learn more).
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