I have tried to advertise my site on here multiple times and they keep denying me. It is just a forum. Any reasons why they might keep denying my ads?
I had the same problem and it was down to the image I was using. Unfortunately I find the warning messages from FB to be very vague and unhelpful. With me it was a matter of retrying until they accepted.
I have never seen any ads that link or take you to a private forum. I guess they disapprove it because is inappropriate. Whats your forum site about?
It is to help you save money and make money doing paid research studies, and there are lots of other various other boards too. You should check it out