I am puzzled by this ticket offer. I am not sure if I am missing anything from the offer.

The 6 continent F ticket cost roughly around 20K US $. Based on the fare it is pretty cheap ( Ex: if i book a ORD DEL ticket in F Class it cost roughly 12,000 US $. )

Are there any other catch in this ? Do I need to pay anything more. I looked through this thread and didn't get the details.

if I have to pay 20 K and get miles it is a great deal ...

Please provide me the details if any one knows more.