I'm planning to move my server version to data center.
What I need to know is about user license. I'm aware that an user means licensing cost, except by anonymous users.
I'd like to give the external users the permission to comment and like pages only, no other rights like collaborating editing content, etc.
I don't want them to comment as anonymous as this can create a bots creating a mess.
So, as the user must be logged into the system, but have only comment and like rights, is it necessary to pay for a license for them?