I've looked at the code of the first vertical banner ad on the main page of sex.com, and it looks something like this:
Code:
<iframe src="http://delivery.ipvertising.com/afr.php?zoneid=35&cb=87971" frameborder="0" scrolling="no" width="160" height="600"></iframe>
I've seen a lot of xxx websites (especially the big / high traffic ones) doing something like this, using different ulr for the ads.
Do you know / can you tell me how this works?
Thank you.