So, I agree an accounting/seminars fee should be the same for all, but IPv4 and IPv6 addresses, as well as AS, PA, PI should be charged for quantity.
So how do you reconcile the fact that assignment policies have changed over time? Do you want to challenge assignements done in the past, by applying today's standards? Even within the RIPE NCCs lifetime, assignment policies have changed ... and legacy address space holders should via the RIPE NCC fee be "financially encouraged" (to use a euphemism) to get rid of their by today's standard large IPv4 address blocks? To hell with this "being an Internet pioneer" thing! We have a saying which translates: When the cribbage is empty, the horses bite each other... I would suggest we not mimic the horses. Regards, - Håvard