So it means those forum sites don't want us to put our referral links from other sites so that we wouldn't have any benefit to gain from it. But the forum site might also need us to bring referrals to their site. How do they expect us to get that?Actually, not all links are bad, but they are often misused by forum members to link shortener links, referrals, etc. Links will be allowed if you only refer to sources such as Twitter, Linkedin, etc. So there is no personal gain.
It’s because there’s some users that just join a forum to spam their links and not interact with the community at all.I honestly do not know the reason behind this. I always wonder what the reason could be myself.