Beware: Major Posting Site Use fake Ads

I will not mention the name of the site because they are so powerful they can Litigate you for ever.
I wondered why when I posted a service or item for sale I might get a few responses then they would never answer back or show up to purchase.
Now the truth comes out. They hire writers to post fake ads and respond but not to buy but to just so you would think someone read your ad.
An example would be like a camera for sale, expensive model well under value, then on the bottom of ad it would say picture examples are available at this site. You go to site and they make you join before you can see the example. If you do respond to email or call it is always gone. I now have also found out this is practiced by some of the local pass on or give away sites.