It is not a product.
And, as such: doesn't need to market itself.
Use it if you want to. Or not.
I wanted to use it, but couldn't make it run - I am not a Python guy, so I went for HashOver (PHP) instead.
Not because HashOver is better, it's not, but because I need to be able to modify/fix the software, and I know PHP better than Python.
But I still believe that Isso is the best self-hosted and open source Disqus alternative in existence.