You can use this my addon - https://xenforo.com/community/resources/some-new-permissions.2085/updates
Create some group like "Trusted users" and give tham permission to post links.
Setup "Not Set (No)" for usergroup "Registered".
And after that setup user group promossion (/admin.php?user-group-promotions/add)
You can really fine-tune that user needs to do to get into the group "Trusted users"