You never know when a prospect or visitor is going to land on your website, so it's best not to push out untested changes. With every save action in Marketpath CMS your preview site is updated. You'll know exactly what your changes look like before publishing to your live site.
As a beta user you'll pay nothing until your site is live and have immediate lifetime access to all new features released during the beta. When you go-live during the beta, you'll get the benefit of a reduced monthly fee for all the same features you've been using.