Simple.
One of two possible responses:
1) Send a cookie to the user that tells the server they’ve already seen the ad, then hide it if they have the cookie on future page loads.
2) do something like … if( FALSE !== strpos( get_bloginfo(‘wpurl’), $_SERVER[‘HTTP_REFERER’] ) ){ echo banner ad }
Good call on the cookie trick, since I don’t think the Javascript on this plugin is active.
But…being the noob that I am… what would the code look like for a cookie that would relay the “already-have-seen-ad” info to the server?