Multiple Users - how many i can add (atm i need 8)?
max 14 additional ‘managed’ users.
up to 99 ‘Plex Friend’ users (without Plex Pass privileges)
Free Apps:
a) how many apps i can unlock?
Not sure, but plenty.
b) can any one from Multiple Users can unlock thers apps for free?
All your ‘managed users’ or Plex Friends you added into your ‘Plex Home’ can do this.
BUT: you should only add people to your Plex Home who are living with you in the same household and whom you trust. Because all that keeps them from changing to your level of access is a 4-digit PIN number.