You may want to rethink the pricing. I have several server variants that I effectively clone in different datacenters across my deployment. Since the base images are static I would really only need to run the agent on n servers (where n is the number of server variants that I have) to ensure that my entire deployment is protected.

I'm not sure if you would consider this unethical. I would probably feel differently about the pricing if it were tiered levels related to the entire size of the deployment (e.g.: 1-50 servers: $x/mo, 50-250 servers: $y/mo, 250+ servers: $z/mo).