It makes sense, as it identifies the specific (medium-hosted) blog as the source, rather than just the hosting platform. I think this is a new feature (at leas

It makes sense, as it identifies the specific (medium-hosted) blog as the source, rather than just the hosting platform. I think this is a new feature (at least, I haven't noticed it before), and seems to apply to some other domains as well, such as twitter.com and github.com.