Hello mfeith,
Well the license per seat is basically how many real users are defined in CMOD.
For example, if you have defined 1000 real users and 3 technical users (which are only use for arsload, setting up the rights and the last one for statistics), then you will basically pay for 1000 licenses.
Now if you have a technical user, that helps all you e-banking users to get documents in CMOD through this technical user. In CMOD one 1 user is define, but behind it, you might have 1 million users... then you need to have also 1 million external user license.
Between the user license and the external user license there is a big difference in price (normally the external is much cheaper than the user one).
Meaning, that the message 30 has no meaning anymore, the most important is really the number of real user defined in your archive, and how many external users are accessing CMOD.
If you want more details and exactly the explanation for your case for your company, I would strongly advise to contact your IBM/IBM Business Partner sales representative. He will explain you exactly how to find out how to find the information.
(Probably this will be a copy paste of what I said, or maybe there are some special case for your company... I don't know).
Hope that helps,
Alessandro