Freenom, the free domains website, is a scam
From the article: "When you get the domain, it will be added to your account but when your website starts to get a lot of traffic, Freenom will remove the domain from your account without notifying you and then put it on sale. You won't be able to get the domain back unless you pay a fee."Now, where else can that business model be applied? You could let people post videos for free, and when they get enough traffic, ads are added. That might be a successful business.