Cost per mille requires only that the publisher make the advertising available on his or her website and display it to the page visitors in order to receive a commission. Pay per click requires one additional step in the conversion process to generate revenue for the publisher: A visitor must not only be made aware of the advertisement but must also click on the advertisement to visit the advertiser's website.
The other monetization method is through the sidebar (and also at the end of every article) is education lead generation. They are probably an affiliate of a number of different schools or other educational lead companies. However, not only are they probably making good money with the site, but they offer great content on the site. They allow users to search by state to find local salaries and much more information. Content is important!
So this is a niche I guess. This is an interesting example of a site built around a high price item that I could see people willing to buy online rather than a store. This doesn’t leave a lot of room to expand into other hot tub areas, but if your focus is “inflatable hot tubs” then go for it. I can’t imagine they update it too often, the last time seems to be August 2015, but what’s new in the world of inflatable hot tubs?
Your domain is the address for your website (e.g., www.affilorama.com) so this is the first thing you will need to do when setting up your site. Considering there are millions of websites on the internet, it's possible that the domain name you want may already be taken by someone else. So make sure you have several options in mind. Be sure to read our advice on how to choose a good domain name.