The feature itself is a handy one, but there are a couple of issues as Fillip H. said. The first one is the https issue, which i'm not certain could be resolved. The second is that sites which copy paste content (especially ones that wouldn't copy edit the content and remove the links anyway) tend to be low ranked and/or have various spam markers by google, and links from those sites can be harmful to SEO, rather than helpful.
Disavowing them as nofollow and still getting the benefit of people seeing your link who visit those sites would be helpful, but it's not exactly and SEO function. We'll keep it as a maybe, and see if we can offer some of the same functionality on an optional basis as this mod does. The lack of https support in the mod itself means we probably won't integrate with it directly.