There is no prohibition against posting LINKS to copy-righted material, only posting the material itself.
Posting the link is not the same.
That’s why some FR threads are link only, because the copy right restrictions prohibit the material but not the links. The threads are still allowed to be posted unless they sources even specify prohibiting links as well.
Perhaps the RM could clear this up....
Links wasn’t posted. Material was.
Q.E.D.
Commentaries should be sourced.
If the material has a copyright notice, then include the source and link.
Click here for copyright restrictions.