Ya exactly humour. Their all owned by the same person and on the same server. The guy has a script on the server connecting all the sites that submit them all to hundreds of DDL sites even though they all contain the same content. He has high paying click adverts on the submitted pages which generate money. As the download links are all on different domains their not noticed. It's like an advanced form of spamming. I've never seen it done this way before on such a scale with so many sites.