Blogspam. Just the comic stolen from here: http://dilbert.com/fast/1995-02-05/

Blogspam!! if you think in this way then all blogs which links to other website are Blogspam.

Yes. Re-posting content from another content without additional commentary is blogspam.

It's not necessary with every post, depends on the nature of post.

Classic! I have one of the Dilbert books and I remember this particular comic vividely.

I saw this behaviour where I use to work before, the very very technical people who are great at their job don't get promoted because the team depends on them, on the other hand, mediocre employees get promoted because them leaving won't disrupt the workflow as much.