Signed in adgrunts get to do more stuff than random visitors that are not signed in. One of the things adgrunts can do is submit advertising links [1] to the ad links [2] page.

The suggest a link link appears underneath the "ad link" menu item in the left block when you are on the ad links page. see image.

Previously asked in the forums here [3] titled " help me out, how do I add a link?".

Oh, sure, we get emails at least once a week where someone wants us to add their link for them. It takes away time from us which we need to do other things (like add news), and adgrunts here get to add their own, so, what exactly is preventing you from signing in and adding it yourself? Hmmm? Think about it. I might store the mails from special snowflakes who can't be bothered adding the link themselves for a later adding-date, then again, I might forget.