2020-04-16 UTC
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oedmarap [tantek]: It's more or less known among pro/semi-pro photographers and is discussed in forums a lot, and you'll see it on any popular photographer IG (along with the practice of uploading exact sized images since IG's compression creates a lot of artifacts). Most artists on IG do the same thing as well, a throwback to Tumblr where reblogs without linkbacks still allow you to see the @username or signature etc.