There is no need for hosting providers.
Pros:
1. Such a site can not be closed and blocked
these points would have been true if these sites you just posted were actually hosted on the blockchain and didn't require you to load them from elsewhere.
for example inspecting the second link (2. Online Crypto-Charts) it is just a simple and small html linking to elsewhere (tradingview.com) which means you are loading the website from a hosted website and it can be blocked!