Here is a message to paid posters. You might not know this but you are screwing your client’s marketing/advertising efforts. I do understand there is a need for these types of activities – many legitimate businesses (real estate, law firms, booksellers, auto dealers, etc) outsource their marketing/advertising activities to others. But when you incessantly spam classified ads sites with certain keywords or URLs, you are forcing operators of these sites to take drastic measures. For example and not surprisingly, banning certain keywords and/or banning some website URLs amongst other things.
As with everything else in life, use moderation so please post your ads in moderation. Nobody needs or wants to see 10-15 “different classified ads” of the same topic.