Allow user to post links after number of posts.

[Goodfella]

I know I have seen this before. Does anyone know how to do this? How to only allow users with a certain number of posts to post links.

I have many users (usually new) that are very good for the community but they post a link to their blog/website in everysingle post the write.

How does everyone else handle this?

 

[Case]

This is a great add-on for that: https://xenforo.com/community/resources/stophumanspam-anti-human-spam.1480/

Set criteria before someone can post links.