Simple Project:
I want to post ads on [login to view URL]
I want to post an ad that has an iframe.
It doesn't let you do it.
However, if you check Backpage (especially the adult section) you will see LOTS of ads using iframes.
I need you to research this and provide me the html code that allows the posting of iframes on backpage.
That is all.
You should test it yourself by test posting an ad, and deliver the code when you are sure you know how