Following blog has a mechanism where special Github Issues appear as comments: http://blog.higher-order.com/blog/2016/04/02/a-comonad-of-graph-decompositions/. The comment at the end of the page corresponds to: https://github.com/runarorama/runarorama.github.com/issues/22#issuecomment-218893374
I think a similar mechanism as a replacement for Disqus might be great as this would mean you can have Github to manage the comments also.