Hi I'm sure this is not the first time, but Competitive Ad Filter doesn't work for me. It keeps displaying the same ad!!! Please advise.
do one thing.. make a back up of your list and remove all from the filter. put it back after some time.
Are you filtering the URL that shows in the ad or the URL that is in the hypertext of the click? Check for deceptive URLs, too. Like the use of 1 for l, or vv for w and things like that. I've seen a number of these slimy tricks used by MFAAs.
Make sure you are adding them one per line and you have blocked the whole domain, not any folder or subdomain.
the filter can need up 2 days to become active. just wait. google says less time but it may take up 2 days. just wait until that time and recheck