IPv6 End User Fee

Anyone charging end users for IPv6 space yet? :p Just wondering, with so many IPv6 resources in a single allocation it would seem difficult to charge anything at all. 1. How are you making up loss of revenue on IPv4 assignments? 2. Are you charging anything? 3. Is the cost built into the service? 4. Do you assign IPv6 space to end user and charge admin fee? Take care, Otis