Snapt licenses the Accelerator based on active connections.
These are the number of connections active on your server at any point in time.
Active Connections only affects the Standard Snapt Licenses as our Enterprise Licenses are based off of Requests/Second.
The limit on the licenses is used mainly as a guideline, if you exceed the value of Active Connections often and certain feature of the interface will be disabled, such as reporting, notifications etc.
Please take into account that if you do go over the limit often that this will not effect your users as no Snapt product ever shuts out your users!