Answer: Everybody who does not possess his own already!
It is just not true, that you don't need a website, if you want to start Internet Marketing.
Read more on my (free, ready made) Adsense Website!
You too can get a new one each month - just insert your adsense code and upload it to your server, then update it now and then with your own or some PLR articles.
An Article site is one of the top Marketing Instruments.
(Watch out for the downloads I added, and for the link at the bottom of the pages that shows you the way to get one for yourself)
You need to have your domain for this of course, Where you can manage your own sites.
The next-best opportunity, and completely free, is a blog. You even find places, where you are paid for blogging and showing your blog, like I do here:
What you see, when you click is my fully customizable Affiliate Page - It is on my server, but could also be on theirs.
My free Homepage there is still under construction - it will look somewhat like this: