WebParts will be useful if
- You need to edit complex web pages of your site
- You need to be able to typeset and reuse complex blocks on the pages of your site.
- You need to edit the layout of Email templates without the need to constantly re-type them by programmers
- You need to edit document templates using a visual editor
How much is it?
For now you can use editor for free, but only one restriction will be amount of possible hosts where you can use editor, it will be only three hosts. If you want more hosts write to email.
If you want to support project, send any money to qiwi pocket below
Also you can use editor for free by using WebParts Service. The link for the WebParts service is located in your personal cabinet.
Whatch how WebParts works
You can see for yourself how editor is working in Examples section of current site or you can visit links below