It got to a point on a pet forum I was on that you could not ignore it. In order to read or post in threads you had to click through several full page adds. It killed the site. Everyone left. I checked it out again when I got Spike and it was still dead. They had pulled back on the adds but it was to late. Everyone was already gone. It wasnt that way when it started out. It was a shame to see it go down because we were all friends.
Here where the adds are just posted to a small section of the screen is fine. That is the way they started on the other forum also. When they place them so that you have to click through them to post or read through posts that is to much.