Yes, agree with you. Just for promote signature post anything on forum, without check whether it will helpful or not.

un fun marketing I call it

Anthing that has no sense, not related or relevant to the forum or topic is considered as spam.

No sense posting in non sensical ways

Thanks for sharing nice information....

forum spam is just posting unrelated posts and duplicate contents using

Forum spamming refers to the posts on forums and that contains unrelated ads and links to mischievous websites.

forum spam is posting useless thing just to show links