I just released another update to Meshcentral.com improving cloud activation of Intel AMT. There is now a new little icon next to the Intel AMT status line in the device page that allows for activation and un-activation of Intel AMT. It's not perfect yet, but it's making lots of progress. You can now easily perform host based provisioning (HBP) and start using Intel AMT right away, all from the web site with a few clicks.
The only thing I still have to work on is un-activation of Intel AMT when it's not been activated using Host Based Provisioning. So, still work to do. It would also be nice to have live feedback as to the provisioning process on the web site. In any case, it's working pretty well as-is.