There are definiitely sites that run Ghost as a fully fledged CMS, but Ghost is designed to be an extremely powerful publishing platform. With Dynamic Routing you’re more likely to be able to create a standalone site.
So what it boils down to is Ghost (at the moment) isn’t meant to be a fully functioning website CMS, so you’re going to have to hack it a bit to make it work for you (i.e. custom renderer for the homepage coupled with blog posts being tagged something specific).
Since Ghost is designed to be a publishing platform they advertise blogs / publications which run their software. While it’s not impossible, you’re going to have trouble finding marketing sites which are Ghost-powered