i dont think its fair to accuse and scold scrollytelling. On their homepage they have a tech section where they state: "Our software is built on top of the Open Source version of Pageflow. We are committed to giving back to the community, which is why we are active contributors, and have open sourced our software too." and they have put a lot of their software up on github.

Yes, this is very similar to Wordpress companies. However it is still their source code, and scrollytelling's webpages are better... dare i say.