But, if all of his posts is just share a news and not really important enough, how it's make sense? This is forum discussion, not twitter where you're only tweeting someone post.
Anyway, a moderators also agree his posts is either spam, low value, or pointless since his posts got deleted as been pointed out above.
In this part, I will support you. Indeed, if almost all posts come down to publishing news, which is also written using copy-paste, then this is not good. When a user abuses copy-paste news and does not add anything to it from their thoughts, then this can be regarded as a low-value post that should be deleted. Often this is abused by campaign participants who make a weekly quota in this way.
A good way for them to stop doing this is to either report or tell the manager of the campaign that the user who is seen doing this is participating in. Perhaps this will motivate him to stop doing this copy-posting.