To tie threads together: an option for The Monastery is to provide the service of hosting messages in exchange for a permanent, non exclusive licence to display, in their entirety, any messages which have not been deleted before the expiry of a period of thirty days from the time of their submission. This general licencing agreement does not preclude any other agreements being executed between The Monastery and any user or group of users.
Some lawyer or paralegal can turn this into legalese. Or maybe someone from the SCA can translate it into latin.
Butlerian Jihad now!