Installed a verify script that reads a json string from the kudoseo.com/cli/domainname.com/accstat.json.
It contains a value that will allow kudoseo to remotely disable the SEM code from inserting optimised content into the host-domain.com/ pages.

So when you are creating a new instance of _kudoseo on a clients website - you must create a directory for them with the accstat.json file in the root kudoseo.com/cli/domainname.com/accstat.json.

accstat.json is the key to the broken _kudoseo puzzle - it plugs in all the paths that it need to Seo a clients website.
If the (curl)file call fails or is unpaid - no SEO optimisation is delivered to the clients website - _kudoseo just remains silent and Errors are emailed to [error-mon@maas.com.au]

For domains that compulsively use (www.) in the domain name …
In the Config.php you have to SET $_SERVER['SERVER_NAME'] to the domain name without the (www.), just the naked domain name (kudoseo.com rather than www.kudoseo.com)