That's actually my point. They should be, and maybe you didn't read the comment I was replying to, but that is in fact exactly what we were talking about - "Unless you have your CV on github.."

Of course having a mess of github project pages is a bad portfolio, but each of the individual projects in your portfolio makes sense as a github project, and the fact that they give you a pleasant <username>.github.io site to tie it all together makes it one of the best ways to host your portfolio.

It makes perfect sense to have github projects as your portfolio parts and turn it into the 'narrative' so beloved of the original author with a github pages site.