Although I see your point, I have to disagree with you...

• You shouldn't expect moderators to read every single post out there and unless someone reports such posts or those that they read naturally, some of the referral links will remain undetected for a longer period ^{[until someone reports them]}.
• If you spot some, take the time to report them ^{[personally, I rarely read threads with a lot of replies unless it has to do with a sport that I support; hence I haven't spotted those that you mentioned [yet]]}.

I think you are wrong in this statement, there's no tolerated referral link threads in this forum, if you have found any please do well to share it here or rather you can possibly report it to moderate to delete.