Although an excellent idea and I'm sure, well run etc, there is one fairly major flaw that isn't advised on the front sales screen for those who want to publish the articles on their site.
In their own words:-
"You cannot add vanilla HTML sites here, including sites created with XSite Pro, FrontPage, DreamWeaver, etc"
The sites they do run with are:-
WordPress blogs 2.0.x onwards - blogs on Blogger.com - blogs on Tumblr.com - Drupal sites - Joomla! sites or other sites that have either an XML-RPC API or an Atom API - as must the Drupal and Joomla.
As I say - I'm sure it's a well run program and worthy for some but I thought for those like me who work specifically through XSP and D8 created HTML sites - handy to know.