I just need some input on this "source" type of links. When people copy exactly intentionally for their viewers who are in same niche and at the same time link back to the main content creator, this is purely backlink from a duplicate content which is not recommended as far as i know. But this is not necessary considering worlds largest sites, they have them in huge numbers. As my site has high chance of getting these links, i wanna know their impact on my site. Have you ever been in this kind of situations ? Do you see positive movements in rankings ?