The customer authorization (provided in the link you clicked) is out of date, and does not entitle you to use the Blended Threat service.
https://evrc.maillist-manage.com/click.zc?od=2d5a885a69b60a972216cd645a566aca51185630859ca1fd0&repDgs=1b1aa02d5a25a45&linkDgs=1b1aa02d5a242c7&mrd=1b1aa02d5a2268b&m=1