I would report it as spam (or link spam) since link dumps are also spam after all. However, interestingly, spam is also not clearly mentioned

(because imho spam can be different from 0-value and from off topic). But I have reported a spam many times and it was ok.
It is not spam, but not a good way of posting either.
Assuming the user continue to create the same topic in different boards or on the same board, that can be reported as spam.
Or if a post carry no meaning at all, it is also a spam.
That post carry a meaning, but which is no more new to us on this forum because we all know about MicroStrategy. The post is not necessary at all and no one gave it merit. There are many post like that on this forum which no merit is given and not deleted by moderator.
The post can not be deleted because it is not plagiarism either.