managing licenses

I'm curious as to how others are managing their Bentley product licensing. We have a situation where we only have a few seats of LEAP Steel, LEAP Concrete, Open bridge modeler, Inroads, microstation, etc... and we have many users, when at any time will need to use any of it. Bentley has decided to not allow any of us to hardcap licenses and would rather charge us for overages that we have no ability to directly manage. WE have enough licenses, just no means with which to organize the users access to them. We need to figure out a solution that keeps Bentley from sending us a quarterly bill for thousands of dollars.