I would say you need a custom entitlement server that connects to your user database. We can set it up for you.
When Adobe allows customizing the library you can probably remove the Archive button as well.
Can that be done with a "Pro" acount. My understanding was that this is only possible with Enterprise accounts. We would also like to give customers who purchase the print book a version that runs on their iPad/Android for convenience for a nominal charge or a combined price.