So I planned to web host my design on these free plan hosting services and put it as parts of my portfolio, like in Behance, so people can click on it and interact with my dynamic or static website.  


Because I do not see people do that around so I guess there must be cons that prevent people from doing so, I would like to know more about it.
Webflow and Squarespace are web builders, not hosting providers.
If you are willing to learn some basic coding, cloudflare pages, GitHub pages, and Netlify offer great hosting at no cost.