Panda Cloud Systems Management allows you to install the agent in as many devices as you decide, although you don't have licenses.
However, bear in mind that the extra devices will be offline. You will have as many online devices as licenses you have contracted. The rest of the devices will be offline which means that you won't be able to monitor them, access remotely, etc.
Example: You install the agent in 9 devices although you only bought 7 licenses. It is possible because you can install the agent in more devices than the licenses available. However, 2 devices will be offline and in the offline devices you won't be able to access remotely or monitor them.