koenrh··on Cisco subdomain private key found in embedded executableNot necessarily. Plex does not hold the private key for their intermediate certificate authority ('Plex Devices High Assurance CA2'). They use a DigiCert API to sign certificates under the 'plex.direct' domain.
koenrh··on Why Dutch Internet users should be concernedYou're probably right. That's why I wrote this little piece :) Although I know this won't be read by the general Dutch public.